This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (August 2009)

One hundred million (100,000,000) is the natural number following 99999999 and preceding 100000001.

In scientific notation, it is written as 10⁸.

[edit] Selected 9-digit numbers (100000001 - 999999999)

• 102334155 - Fibonacci number
• 107890609 - Wedderburn-Etherington number
• 111111111 - repunit, square root of 12345678987654321
• 111111113 - Chen prime, Sophie Germain prime, cousin prime.
• 123456789 - smallest zeroless pandigital number
• 129140163 = 3¹⁷
• 129644790 - Catalan number
• 134217728 = 2²⁷
• 139854276 - the smallest pandigital square
• 142547559 - Motzkin number
• 165580141 - Fibonacci number
• 179424673 - 10000000th prime number
• 190899322 - Bell number
• 214358881 = 11⁸
• 222222222 - repdigit
• 222222227 - safe prime
• 225058681 - Pell number
• 225331713 - self-descriptive number in base 9
• 244140625 = 5¹¹
• 253450711 - Wedderburn-Etherington number
• 267914296 - Fibonacci number
• 268402687 - Carol number
• 268435456 = 2²⁸
• 268468223 - Kynea number
• 272400600 - the number of terms of the harmonic series required to pass 20
• 275305224 - the number of magic squares of order 5, excluding rotations and reflections
• 282475249 = 7¹⁰
• 333333333 - repdigit
• 367567200 - colossally abundant number
• 381654729 - the only polydivisible number that is also a zeroless pandigital number
• 387420489 = 3¹⁸, 9⁹ and in tetration notation ²9
• 400763223 - Motzkin number
• 433494437 - Fibonacci number
• 442386619 - alternating factorial
• 444444444 - repdigit
• 477638700 - Catalan number
• 479001599 - factorial prime
• 479001600 = 12!
• 536870912 = 2²⁹
• 543339720 - Pell number
• 554999445 - 9-digit analogue to Kaprekar constant
• 555555555 - repdigit
• 596572387 - Wedderburn-Etherington number
• 666666666 - repdigit
• 701408733 - Fibonacci number
• 715827883 - Wagstaff prime
• 777777777 - repdigit
• 815730721 = 13⁸
• 888888888 - repdigit
• 906150257 - smallest counterexample to the Polya conjecture
• 987654321 - largest zeroless pandigital number
• 999999937 - largest 9-digit prime
• 999999999 - repdigit

[edit] See also

• Social Security number