101,891
101,891 is a prime, odd.
101,891 (one hundred one thousand eight hundred ninety-one) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x18E03.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 198,101
- Flips to (rotate 180°)
- 168,101
- Square (n²)
- 10,381,775,881
- Cube (n³)
- 1,057,809,526,290,971
- Divisor count
- 2
- σ(n) — sum of divisors
- 101,892
- φ(n) — Euler's totient
- 101,890
Primality
101,891 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√101,891 = [319; (4, 1, 10, 49, 63, 1, 4, 1, 1, 3, 4, 3, 4, 1, 1, 1, 1, 24, 1, 12, 1, 11, 8, 1, …)]
Representations
- In words
- one hundred one thousand eight hundred ninety-one
- Ordinal
- 101891st
- Binary
- 11000111000000011
- Octal
- 307003
- Hexadecimal
- 0x18E03
- Base64
- AY4D
- One's complement
- 4,294,865,404 (32-bit)
- Scientific notation
- 1.01891 × 10⁵
- As a duration
- 101,891 s = 1 day, 4 hours, 18 minutes, 11 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵ραωϟαʹ
- Mayan (base 20)
- 𝋬·𝋮·𝋮·𝋫
- Chinese
- 一十萬一千八百九十一
- Chinese (financial)
- 壹拾萬壹仟捌佰玖拾壹
Also seen as
As an unsigned 32-bit integer, this is the IPv4 address 0.1.142.3.
- Address
- 0.1.142.3
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.142.3
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 101,891 and was likely granted around 1870.
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.
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.