109 (number)

109 prime 29th 1, 109 109 (one hundred [and] nine) is the natural number following 108 and preceding 110. In mathematics 109 is the 29th prime number. As 29 is itself prime, 109 is the tenth super-prime.A006450 Primes with prime subscripts The previous prime is 107, making them both twin primes.A006512 Greater of twin primes 109 is a centered triangular number.A005448 Centered triangular numbers There are exactly: 109 different families of subsets of a three-element set whose union includes all three elements.A003465 Number of ways to cover an n-set 109 different loops (invertible but not necessarily associative binary operations with an identity) on six elements.A057771 Number of loops (quasigroups with an identity element) of order n 109 squares on an infinite chessboard that can be reached by a knight within three moves.A018836 Number of squares on infinite chess-board at ≤ n knight's moves from a fixed square There are 109 uniform edge-colorings to the 11 regular and semiregular (or Archimedean) tilings.Asaro Laura Hyde John Jensen Melanie Mann Casey Schroeder Tyler 2 https://www.sciencedirect.com/science/article/pii/S0012365X14003288 Uniform edge-c-colorings of the Archimedean tilings Discrete Mathematics 338 1 19–22 January 2015 10.1016/j.disc.2014.08.015 1308.52017 subscription The decimal expansion of 1/109 can be computed using the alternating series, with the Fibonacci number: The decimal expansion of 1/109 has 108 digits, making 109 a full reptend prime in decimal. The last six digits of the 108-digit cycle are 853211, the first six Fibonacci numbers in descending order.https://www.goldennumber.net/89-and-109/ 89, 109, and the Fibonacci Sequence May 15, 2012 November 8, 2022 See also 109 (disambiguation) References 1 Category:Integers Category: Prime numbers