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On many handheld scientific and graphing [[calculator]]s, the highest [[factorial]] that can be calculated, due to memory limitations, is 69!, or about 1.711224524{{e|98}}.
On many handheld scientific and graphing [[calculator]]s, the highest [[factorial]] that can be calculated, due to memory limitations, is 69!, or about 1.711224524{{e|98}}.


==In science==
==In other fields==
{{see also|list of highways numbered 69}}
* The [[atomic number]] of [[thulium]], a [[lanthanide]].
In [[chemistry]], 69 is the [[atomic number]] of [[thulium]], a rare [[lanthanide]] (category of [[metal]]lic elements).<ref>{{cite book|last=Stwertka|first=Albert|year=2002|title=A Guide to the Elements|edition=2|publisher=[[Oxford University Press]]|isbn=9780195150261|page=161}}</ref> In [[astronomy]], the [[Messier object]] [[Messier 69|M69]] is a [[globular cluster]] in the [[constellation]] of [[Sagittarius (constellation)|Sagittarius]];<ref>{{cite book|last=Kitchin|first=C. R.|year=2012|title=Illustrated Dictionary of Practical Astronomy|publisher=[[Springer London]]|isbn=9781447101758|page=262}}</ref> [[69 Hesperia]] is a [[main-belt]] asteroid.<ref>{{cite journal|display-authors=6|last=Shepard|first=Michael K.|author2=Harris, Alan W.|author3=Taylor, Patrick A.|author4=Clark, Beth Ellen|author5=Ockert-Bell, Maureen|author6=Nolan, Michael C.|author7=Howell, Ellen S.|author8=Magri, Christopher|author9=Giorgini, Jon D.|author10=Benner, Lance A. M.|date=3 August 2011|title=Radar observations of Asteroids 64 Angelina and 69 Hesperia|journal=Icarus|publisher=[[Elsevier]]|volume=215|issue=2|pages=547–551|url=http://echo.jpl.nasa.gov/asteroids/MBAs/shepard.etal.2011.angelina+hesperia.pdf|via=[[NASA]]|access-date=22 April 2024}}</ref> [[NGC 69]] is the designation given to a barred [[lenticular galaxy]] located in the [[Andromeda (constellation)|Andromeda constellation]].<ref>{{cite web|url=http://spider.seds.org/ngc/ngc.cgi?ngc+69|title=NGC 69|publisher=[[Students for the Exploration and Development of Space]]|date=n.d.|access-date=22 April 2024}}</ref><ref>{{cite book|first=Wolfgang|last=Steinicke|year=2010|title=Observing and Cataloguing Nebulae and Star Clusters: From Herschel to Dreyer's New General Catalogue|publisher=[[Cambridge University Press]]|isbn=9781139490108|page=191}}</ref> 69 also resembles the symbol of the [[zodiac sign]] for [[Cancer (astrology)|Cancer]], <code>♋︎</code>,<ref>{{cite book|first=Michele|last=Finey|year=2010|title=Secrets of the Zodiac: An In-Depth Guide to Your Talents, Challenges, Personality and Potential|publisher=ReadHowYouWant|isbn=
9781458763365|page=109}}</ref> and in the [[Canadian Football League]], [[ineligible receiver]]s wear [[number (sports)|numbers]] 50 to 69.<ref>{{cite news|url=https://www.cfl.ca/2009/10/07/an-ineligible-number-an-eligible-position/|last=Higgins|first=Tom|date=7 October 2009|title=An ineligible number, an eligible position|publisher=[[Canadian Football League]]|access-date=22 April 2024}}</ref>


⚫
[[69ing]] is a [[sex position]] wherein each partner aligning themselves to simultaneously achieve [[oral sex]] with each other.<ref>{{cite book|last=Coleman|first=Julia|year=2022|title=Love, Sex, and Marriage: A Historical Thesaurus|publisher=[[Brill Publishers]]|isbn=9789004488502|page=214}}</ref> In reference to this sex act, the number 69 itself has become an [[Internet meme]] as an inherently funny number in which users will respond to any occurrence of the number with the word "nice" to draw specific attention to it. This means to humorously imply that the reference to the sex position was intentional. Because of its association with the sex position and resulting meme, 69 has been named "the sex number".<ref>{{cite news|last=Feldman|first=Brian|date=9 June 2016|title=Why 69 Is the Internet's Coolest Number (Sex)|website=[[Intelligencer (website)|Intelligencer]]|url=https://nymag.com/intelligencer/2016/06/why-69-is-the-internets-coolest-number-sex.html|access-date=22 April 2024}}</ref>
===Astronomy===
* The [[Messier object]] [[Messier 69|M69]] is a [[visual magnitude|magnitude]] 9.0 [[globular cluster]] in the [[constellation]] [[Sagittarius (constellation)|Sagittarius]].
<!--
: The [[New General Catalogue]] [http://www.ngcic.org/ object] [[NGC 69]], a [[galaxy]] in the constellation [[Andromeda (constellation)|Andromeda]]

:The [[Saros]] [http://sunearth.gsfc.nasa.gov/eclipse/SEsaros/SEsaros1-175.html number] of the [[solar eclipse]] series which began on [[-742]] [[November 28]] and ended on [[665]] [[March 22]]. The duration of Saros series 69 was 1406.3 years, and it contained 79 solar eclipses.

:The Saros [http://sunearth.gsfc.nasa.gov/eclipse/LEsaros/LEsaros1-175.html number] of the [[lunar eclipse]] series which began on [[-548]] [[July 3]] and ended on [[768]] [[September 1]]. The duration of Saros series 69 was 1316.2 years, and it contained 74 lunar eclipses.
-->

==In other fields==
'''Sixty-nine''' may also refer to:
* [[69 (sex position)|69ing]], a sex position involving each partner aligning themselves to achieve oral sex simultaneously with each other.
⚫
** In reference to the sex position, "69" has become an [[Internet meme]], where users will respond to any occurrence of the number with the word "nice" to draw specific attention to it. This means to humorously imply that the reference to the sex position was intentional. Because of its association with the sex position and resulting meme, "69" has been named "the sex number".<ref name="Feldman 2016">{{cite web | last=Feldman | first=Brian | title=Why 69 Is the Internet's Coolest Number (Sex) | website=Intelligencer | date=2016-06-09 | url=https://nymag.com/intelligencer/2016/06/why-69-is-the-internets-coolest-number-sex.html | access-date=2020-09-04}}</ref>
* The registry of the [[United States Navy|U.S. Navy's]] aircraft carrier {{USS|Dwight D. Eisenhower|CVN-69}}, named after Dwight D. Eisenhower, the 34th President of the United States and five-star general in the United States Army.
* The number of the French department [[Rhône (department)|Rhône]]. The [[Lyon Metropolis]], which was separated from the Rhône department in 2015, is designated as "69M". The [[Postal codes in France|postal codes]] for both entities start with "69".
* The [[Taijitu]]
* The last possible [[television channel]] number in the [[Ultra high frequency|UHF]] bandplan for American terrestrial television from 1982 until its withdrawal on December 31, 2011.


==References==
==References==
{{Reflist}}
{{reflist}}

==External links==
* {{cite web|last=Eaves|first=Laurence|title=69!|url=http://www.numberphile.com/videos/69.html|work=Numberphile|publisher=[[Brady Haran]]|author-link=Laurence Eaves|access-date=2013-04-01|archive-url=https://web.archive.org/web/20130330080212/http://www.numberphile.com/videos/69.html|archive-date=2013-03-30|url-status=dead}}


{{Integers|zero}}
{{Integers|zero}}

Revision as of 05:57, 22 April 2024

← 68 69 70 →
Cardinalsixty-nine
Ordinal69th
(sixty-ninth)
Factorization3 × 23
Divisors1, 3, 23, 69
Greek numeralΞΘ´
Roman numeralLXIX
Binary10001012
Ternary21203
Senary1536
Octal1058
Duodecimal5912
Hexadecimal4516

69 (sixty-nine) is the natural number following 68 and preceding 70.

In mathematics

69 is:

Because 69 has an odd number of 1s in its binary representation, it is sometimes called an "odious number."

In decimal, 69 is the only natural number whose square (4761) and cube (328509) use every digit from 0–9 exactly once.[7]

69 is equal to 105 octal, while 105 is equal to 69 hexadecimal. This same property can be applied to all numbers from 64 to 69.

On many handheld scientific and graphing calculators, the highest factorial that can be calculated, due to memory limitations, is 69!, or about 1.711224524×1098.

In other fields

See also: list of highways numbered 69

In chemistry, 69 is the atomic number of thulium, a rare lanthanide (category of metallic elements).[8] In astronomy, the Messier object M69 is a globular cluster in the constellation of Sagittarius;[9] 69 Hesperia is a main-belt asteroid.[10] NGC 69 is the designation given to a barred lenticular galaxy located in the Andromeda constellation.[11][12] 69 also resembles the symbol of the zodiac sign for Cancer, ♋︎,[13] and in the Canadian Football League, ineligible receivers wear numbers 50 to 69.[14]

69ing is a sex position wherein each partner aligning themselves to simultaneously achieve oral sex with each other.[15] In reference to this sex act, the number 69 itself has become an Internet meme as an inherently funny number in which users will respond to any occurrence of the number with the word "nice" to draw specific attention to it. This means to humorously imply that the reference to the sex position was intentional. Because of its association with the sex position and resulting meme, 69 has been named "the sex number".[16]

References

  1. ^ "Sloane's A000959 : Lucky numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  2. ^ "Sloane's A001358".
  3. ^ Sloane, N. J. A. (ed.). "Sequence A001748". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  4. ^ "Sloane's A016105 : Blum integers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  5. ^ Sloane, N. J. A. (ed.). "Sequence A024916 (sum_{k=1..n} sigma(k) where sigma(n) = sum of divisors of n)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  6. ^ Sloane, N. J. A. (ed.). "Sequence A000787 (Strobogrammatic numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2022-05-07.
  7. ^ David Wells: The Penguin Dictionary of Curious and Interesting Numbers
  8. ^ Stwertka, Albert (2002). A Guide to the Elements (2 ed.). Oxford University Press. p. 161. ISBN 9780195150261.
  9. ^ Kitchin, C. R. (2012). Illustrated Dictionary of Practical Astronomy. Springer London. p. 262. ISBN 9781447101758.
  10. ^ Shepard, Michael K.; Harris, Alan W.; Taylor, Patrick A.; Clark, Beth Ellen; Ockert-Bell, Maureen; Nolan, Michael C.; et al. (3 August 2011). "Radar observations of Asteroids 64 Angelina and 69 Hesperia" (PDF). Icarus. 215 (2). Elsevier: 547–551. Retrieved 22 April 2024 – via NASA.
  11. ^ "NGC 69". Students for the Exploration and Development of Space. n.d. Retrieved 22 April 2024.
  12. ^ Steinicke, Wolfgang (2010). Observing and Cataloguing Nebulae and Star Clusters: From Herschel to Dreyer's New General Catalogue. Cambridge University Press. p. 191. ISBN 9781139490108.
  13. ^ Finey, Michele (2010). Secrets of the Zodiac: An In-Depth Guide to Your Talents, Challenges, Personality and Potential. ReadHowYouWant. p. 109. ISBN 9781458763365.
  14. ^ Higgins, Tom (7 October 2009). "An ineligible number, an eligible position". Canadian Football League. Retrieved 22 April 2024.
  15. ^ Coleman, Julia (2022). Love, Sex, and Marriage: A Historical Thesaurus. Brill Publishers. p. 214. ISBN 9789004488502.
  16. ^ Feldman, Brian (9 June 2016). "Why 69 Is the Internet's Coolest Number (Sex)". Intelligencer. Retrieved 22 April 2024.
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