3,997
3,997 is a composite number, odd.
Properties
Primality
Prime factorization: 7 × 571
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- three thousand nine hundred ninety-seven
- Ordinal
- 3997th
- Roman numeral
- MMMCMXCVII
- Binary
- 111110011101
- Octal
- 7635
- Hexadecimal
- 0xF9D
- Base64
- D50=
- One's complement
- 61,538 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹 𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵γϡϟζʹ
- Mayan (base 20)
- 𝋩·𝋳·𝋱
- Chinese
- 三千九百九十七
- Chinese (financial)
- 參仟玖佰玖拾柒
Digit at this position in famous constants
- π — Pi (π)
- Digit 3,997 = 6
- e — Euler's number (e)
- Digit 3,997 = 3
- φ — Golden ratio (φ)
- Digit 3,997 = 4
- √2 — Pythagoras's (√2)
- Digit 3,997 = 5
- ln 2 — Natural log of 2
- Digit 3,997 = 9
- γ — Euler-Mascheroni (γ)
- Digit 3,997 = 7
Also seen as
UTF-8 encoding: E0 BE 9D (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.15.157.
- Address
- 0.0.15.157
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.15.157
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.
The digit sequence 3997 first appears in π at position 15,272 of the decimal expansion (the 15,272ordinal-suffix:nd 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.