49 (number)
From Wikipedia, the free encyclopedia
| 49 | |
|---|---|
| Cardinal | forty-nine |
| Ordinal | 49th (forty-ninth) |
| Factorization | 72 |
| Divisors | 1, 7, 49 |
| Roman numeral | XLIX |
| Binary | 1100012 |
| Octal | 618 |
| Duodecimal | 4112 |
| Hexadecimal | 3116 |
- This page is for the number. For the steamboat see Forty-Nine (steamboat)
49 (forty-nine) is the natural number following 48 and preceding 50.
Contents |
[edit] In mathematics
Forty-nine is the square of 7, and like all squares of odd numbers, it is a centered octagonal number.
49 is one of the two number with an aliquot sum of 8; the other being 10. Its aliquot sequence is (49, 8, 7, 1, 0).
It appears in the Padovan sequence, preceded by the terms 21, 28, 37 (it is the sum of the first two of these).
Since the greatest prime factor of 492 + 1 = 2402 is 1201, which is clearly more than 49 twice, 49 is a Størmer number. Also number 49 is a happy number!
[edit] In chemistry
- The atomic number of indium.
- During the Manhattan Project, plutonium was also often referred, simply, to as "49". Number 4 was for the last digit in 94 (atomic number of plutonium) and 9 for the last digit in Pu-239, the weapon-grade fissile isotope used in nuclear bombs.[1][2]
[edit] In astronomy
- Messier object M49, a magnitude 10.0 galaxy in the constellation Virgo.
- The New General Catalogue object NGC 49, a spiral galaxy in the constellation Cetus.
- The Saros number of the solar eclipse series which began on -1248 February 22 and ended on 32 March 29. The duration of Saros series 49 was 1280.1 years, and it contained 72 solar eclipses.
- The Saros number of the lunar eclipse series which began on -1217 June 21 and ended on 81 August 8. The duration of Saros series 49 was 1298.1 years, and it contained 73 lunar eclipses.
[edit] In religion
- On the Hebrew calendar, the number of days of the Counting of the Omer
- The number of days and night Siddhartha Gautama spent meditating as a holy man
[edit] In sports
- '49er, the moniker of one who participated in the 1849 California Gold Rush, as well as the NFL's San Francisco 49ers.
- The Number of the All-Time Hall of Fame Quarterback Alexander Wenzel
- Astros Larry Dierker's retired uniform #49.
- New York Yankees Ron Guidry’s retired uniform #49.
- Arsenal had a 49 unbeaten run between May 2003 to October 2004 which is a national record in English football.
[edit] In music
- Funk #49, the title of a hit song by the James Gang
- Featured in the song title "49 Bye-Byes" in Crosby Stills and Nash's self-titled album
- Song: 'Days of 49” by Bob Dylan
[edit] In other fields
Forty-nine is:
- The number of strings on a harp and the number of keys on a celesta
- HP-49 series is a Hewlett Packard calculator
- I-49 is the designation for a US interstate highway in Louisiana
- The code for international direct dial phone calls to Germany
- In the title of Thomas Pynchon's novel The Crying of Lot 49
- In the title of the movie Ladder 49
- In the title of the movie 49 Up
- A 49 is a term used to describe a party after a powwow, usually held by the powwow participants. it also refers to a particular type of song that is sung on such occasions.
- 49th State: Alaska
- 49th parallel between Canada and the USA
- At age 49, former PTL minister, Jim Bakker, sent to prison on fraud/tax evasion charges (1989)
- Ernest Hemingway collection: The Fifth Column and The First Forty-Nine Stories
- Japanese GS1 country code
[edit] Historical years
[edit] References
- ^ Hammel, E.F. (2000). "The taming of "49" — Big Science in little time. Recollections of Edward F. Hammel, pp. 2-9. In: Cooper N.G. Ed. (2000). Challenges in Plutonium Science". Los Alamos Science 26 (1): 2–9.
- ^ Hecker, S.S. (2000). "Plutonium: an historical overview. In: Challenges in Plutonium Science". Los Alamos Science 26 (1): 1–2.
