100000000

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

In scientific notation, it is written as 10⁸.

East Asian languages treat 100,000,000 as a counting unit, significant as the square of a myriad, also a counting unit. In Chinese, Japanese, and Korean respectively it is yì (億) (or wànwàn [萬萬] in ancient texts), oku (億), and eok (억/億). These languages do not have single words for a thousand to the second, third, fifth power, etc.)

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 base 10 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

See also

• Social Security number