1,009,991
1,009,991 is a prime, odd.
1,009,991 (one million nine thousand nine hundred ninety-one) is an odd 7-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0xF6947.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 7
- Digit sum
- 29
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 1,999,001
- Flips to (rotate 180°)
- 1,666,001
- Square (n²)
- 1,020,081,820,081
- Cube (n³)
- 1,030,273,457,545,429,271
- Divisor count
- 2
- σ(n) — sum of divisors
- 1,009,992
- φ(n) — Euler's totient
- 1,009,990
Primality
1,009,991 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√1,009,991 = [1004; (1, 58, 8, 1, 1, 6, 2, 2, 1, 6, 29, 1, 5, 1, 2, 4, 1, 2, 2, 13, 2, 1, 11, 1, …)]
Representations
- In words
- one million nine thousand nine hundred ninety-one
- Ordinal
- 1009991st
- Binary
- 11110110100101000111
- Octal
- 3664507
- Hexadecimal
- 0xF6947
- Base64
- D2lH
- One's complement
- 4,293,957,304 (32-bit)
- Scientific notation
- 1.009991 × 10⁶
- As a duration
- 1,009,991 s = 11 days, 16 hours, 33 minutes, 11 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒁹
- Egyptian hieroglyphic
- 𓁨𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Chinese
- 一百萬九千九百九十一
- Chinese (financial)
- 壹佰萬玖仟玖佰玖拾壹
Also seen as
As an unsigned 32-bit integer, this is the IPv4 address 0.15.105.71.
- Address
- 0.15.105.71
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.15.105.71
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 1,009,991 and was likely granted around 1911.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.