1,000,000,000

List of numbers Integers
Cardinal	One billion
Ordinal	Billionth or One billionth
Factorization	$2^{9}\times 5^{9}$
Greek numeral
Roman numeral
Binary
Ternary
Senary
Octal
Duodecimal
Hexadecimal

One thousand million (1,000,000,000) is the natural number following 999999999 and preceding 1000000001. (It is usually called a "billion." A "Milliard" can sometimes refer to 1,000,000,000, however).

In scientific notation, it is written as 10⁹. Physical quantities can be expressed using the SI prefix giga.

See Orders of magnitude (numbers) for larger numbers.

Selected 10-digit numbers (1000000001 - 9999999999)

• 1023456789 - smallest pandigital number
• 1073676287 - Carol number
• 1073807359 - Kynea number
• 1111111111 - repunit
• 1129760415 - Motzkin number
• 1134903170 - Fibonacci number
• 1162261467 = 3^19
• 1220703125 = 5^12
• 1234567890 - pandigital number with the digits in order
• 1311738121 - Pell number
• 1382958545 - Bell number
• 1406818759 - Wedderburn-Etherington number
• 1836311903 - Fibonacci prime
• 2222222222 - repdigit
• 2971215073 - Fibonacci prime
• 3166815962 - Pell number
• 3192727797 - Motzkin number
• 3323236238 - Wedderburn-Etherington number
• 3333333333 - repdigit
• 3486784401 = 3^20
• 4294836223 - Carol number
• 4295098367 - Kynea number
• 4444444444 - repdigit
• 4807526976 - Fibonacci number
• 5555555555 - repdigit
• 5784634181 - alternating factorial
• 6210001000 - the only self-descriptive number in base 10
• 6227020800 = 13!
• 6666666666 - repdigit
• 7645370045 - Pell number
• 7777777777 - repdigit
• 7778742049 - Fibonacci number
• 7862958391 - Wedderburn-Etherington number
• 8888888888 - repdigit
• 9043402501 - Motzkin number
• 9814072356 - largest square pandigital number, largest pandigital pure power
• 9876543210 - largest pandigital number without redundant digits
• 9999999999 - repdigit