# 27 (number)

 ← 26 27 28 →
Cardinal twenty-seven
Ordinal 27th
(twenty-seventh)
Factorization 33
Divisors 1, 3, 9, 27
Roman numeral XXVII
Binary 110112
Ternary 10003
Quaternary 1234
Quinary 1025
Octal 338
Duodecimal 2312
Vigesimal 1720
Base 36 R36

27 (twenty-seven) is the natural number following 26 and preceding 28.

## In mathematics

• In base 10, it is the first composite number not evenly divisible by any of its digits.
• 27 is the only positive integer that is 3 times the sum of its digits.
• In the Collatz conjecture (aka the "3n + 1 conjecture") a starting value of 27 requires 112 steps to reach 1, many more than any lower number.
• The unique simple formally real Jordan algebra, the exceptional Jordan algebra of self-adjoint 3 by 3 matrices of quaternions, is 27-dimensional.[1]
• It is the twenty-eighth (and twenty-ninth) digit in π. (3.141592653589793238462643383279...). If you start counting with 0 it is considered one of few Self-Locating strings in pi.
• 27 contains the decimal digits 2 and 7, and is the result of adding together the integers from 2 to 7 (2+3+4+5+6+7=27)

## In science

• The atomic number of cobalt.
• The atomic weight of the only stable isotope of aluminum.
• 27 Geological epochs of Earth - Middle Triassic of the Mesozoic

## In religion, philosophy and the occult

• The Greek Strongs number G27 is "Agapetos" which means "Beloved", as found in the New Testament of the Bible.
• 27 - the highest level of knowledge in rupaloke (Buddhism).
• 27 - number of grains in some Buddhist rosary (108 divided by 4).
• In almost all Christian traditions today, the New Testament consists of 27 books
• Pythagoras and Plato say that the number 3 in the cubed (i.e. 27) and number 2 in the cubed (i.e., 8) represent the Cosmos.
• In the Kabbalah there are 27 letters, corresponding to 27 channels of communication with God and 27 combinations of the names of God and - 13 overt and 14 covert.
• Some Masonic lodges have the 27th title.
• 27 - number of United Trinity Church, taken 9 times, symbolizing the fullness of the Absolute.
• Mystical root of 27 is the number 9.
• According to Feng Shui, to raise money, keep in the house 27 identical coins.
• In ancient Incan culture there were 27 roads to El Dorado.
• In Nidaros there were 27 archbishops (between 1153 and 1537)

## In astrology

• 27 signs of the zodiac in Indian astrology

## In art

Movies:

• Summer, or 27 missing kisses
• Chapter 27-I
• 27 Dresses
• 27 fights
• Order number 27
• Number 27 (written by Michael Palin)

References:

• Three of the cube is zero (science-fiction story)

other

• The Minneapolis-based artist Deuce 7 (a.k.a. Deuce Seven, Twenty Seven, 27).

## In other fields

Twenty-seven is also:

• A-27 - American attack aircraft
• The 27th U.S.A state - Florida
• The total number of letters in the Hebrew alphabet (22 regular letters and 5 final consonants)
• The total number of letters in the Spanish alphabet (5 vowels and 22 consonants)
• The number of Amendments to the United States Constitution (As of May 7, 1992)
• The code for international direct-dial phone calls to South Africa
• The designation (I-27) of a US interstate highway in Texas
• The designation (US 27) of a United States national highway from Fort Wayne, Indiana to Miami, Florida
• The name of a cigarette, Marlboro Blend No. 27
• Alternate name for The Hunt, a book by William Diehl
• The number of the French department Eure
• The number of countries in the European Union (as of August 2011)
• Abbé Faria's prisoner number in the book The Count of Monte Cristo
• The number of species Captain Jean-Luc Picard has made contact with in the series Star Trek: The Next Generation
• One of the anthropomorphic math symbols Lisa Simpson imagines talking to her in The Simpsons episode "Girls Just Want to Have Sums", which, instead of offering the expected pun-based aphorism, rather unhelpfully only says "twenty seven"
• In Stephen King's novel "It", It returns every 27 years to Derry.
• 27 is the number of bones in the human hand.[2]
• 27 is the number of MotoGP worldchampion Casey Stoner.

## References

1. ^ V. G. Kac, "Classification of Simple Z-Graded Lie Superalgebras and Simple Jordan Superalgebras" Communications in Algebra 5 13 (1977): 1380
2. ^ Steve Jenkins, Bones (2010), ISBN 978-0-545-04651-0