31,997
31,997 is a composite number, odd.
31,997 (thirty-one thousand nine hundred ninety-seven) is an odd 5-digit number. It is a composite number with 6 divisors, and factors as 7² × 653. Written other ways, in hexadecimal, 0x7CFD.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 29
- Digit product
- 1,701
- Digital root
- 2
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 79,913
- Recamán's sequence
- a(13,341) = 31,997
- Square (n²)
- 1,023,808,009
- Cube (n³)
- 32,758,784,863,973
- Divisor count
- 6
- σ(n) — sum of divisors
- 37,278
- φ(n) — Euler's totient
- 27,384
- Sum of prime factors
- 667
Primality
Prime factorization: 7 2 × 653
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√31,997 = [178; (1, 7, 7, 2, 18, 2, 1, 3, 4, 1, 1, 1, 2, 4, 6, 1, 1, 1, 6, 1, 1, 1, 6, 4, …)]
Period length 38 — the block in parentheses repeats forever.
Representations
- In words
- thirty-one thousand nine hundred ninety-seven
- Ordinal
- 31997th
- Binary
- 111110011111101
- Octal
- 76375
- Hexadecimal
- 0x7CFD
- Base64
- fP0=
- One's complement
- 33,538 (16-bit)
- Scientific notation
- 3.1997 × 10⁴
- As a duration
- 31,997 s = 8 hours, 53 minutes, 17 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵λαϡϟζʹ
- Mayan (base 20)
- 𝋣·𝋳·𝋳·𝋱
- Chinese
- 三萬一千九百九十七
- Chinese (financial)
- 參萬壹仟玖佰玖拾柒
Digit at this position in famous constants
- π — Pi (π)
- Digit 31,997 = 8
- e — Euler's number (e)
- Digit 31,997 = 0
- φ — Golden ratio (φ)
- Digit 31,997 = 3
- √2 — Pythagoras's (√2)
- Digit 31,997 = 5
- ln 2 — Natural log of 2
- Digit 31,997 = 3
- γ — Euler-Mascheroni (γ)
- Digit 31,997 = 5
Also seen as
UTF-8 encoding: E7 B3 BD (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.124.253.
- Address
- 0.0.124.253
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.124.253
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 31997 first appears in π at position 109,676 of the decimal expansion (the 109,676ordinal-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.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.