108,991
108,991 is a prime, odd.
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 28
- Digit product
- 0
- Digital root
- 1
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 199,801
- Flips to (rotate 180°)
- 166,801
- Square (n²)
- 11,879,038,081
- Cube (n³)
- 1,294,708,239,486,271
- Divisor count
- 2
- σ(n) — sum of divisors
- 108,992
- φ(n) — Euler's totient
- 108,990
Primality
108,991 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√108,991 = [330; (7, 3, 1, 13, 1, 10, 1, 1, 1, 6, 1, 2, 8, 2, 5, 13, 43, 1, 16, 2, 1, 1, 23, 1, …)]
Representations
- In words
- one hundred eight thousand nine hundred ninety-one
- Ordinal
- 108991st
- Binary
- 11010100110111111
- Octal
- 324677
- Hexadecimal
- 0x1A9BF
- Base64
- Aam/
- One's complement
- 4,294,858,304 (32-bit)
- Scientific notation
- 1.08991 × 10⁵
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρηϡϟαʹ
- Mayan (base 20)
- 𝋭·𝋬·𝋩·𝋫
- Chinese
- 一十萬八千九百九十一
- Chinese (financial)
- 壹拾萬捌仟玖佰玖拾壹
Also seen as
As an unsigned 32-bit integer, this is the IPv4 address 0.1.169.191.
- Address
- 0.1.169.191
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.169.191
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 108,991 and was likely granted around 1871.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 108991 first appears in π at position 506,547 of the decimal expansion (the 506,547ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.