13,987
13,987 is a composite number, odd.
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 28
- Digit product
- 1,512
- Digital root
- 1
- Palindrome
- No
- Bit width
- 14 bits
- Reversed
- 78,931
- Recamán's sequence
- a(20,742) = 13,987
- Square (n²)
- 195,636,169
- Cube (n³)
- 2,736,363,095,803
- Divisor count
- 4
- σ(n) — sum of divisors
- 14,256
- φ(n) — Euler's totient
- 13,720
- Sum of prime factors
- 268
Primality
Prime factorization: 71 × 197
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- thirteen thousand nine hundred eighty-seven
- Ordinal
- 13987th
- Binary
- 11011010100011
- Octal
- 33243
- Hexadecimal
- 0x36A3
- Base64
- NqM=
- One's complement
- 51,548 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ιγϡπζʹ
- Mayan (base 20)
- 𝋡·𝋮·𝋳·𝋧
- Chinese
- 一萬三千九百八十七
- Chinese (financial)
- 壹萬參仟玖佰捌拾柒
Digit at this position in famous constants
- π — Pi (π)
- Digit 13,987 = 2
- e — Euler's number (e)
- Digit 13,987 = 3
- φ — Golden ratio (φ)
- Digit 13,987 = 2
- √2 — Pythagoras's (√2)
- Digit 13,987 = 1
- ln 2 — Natural log of 2
- Digit 13,987 = 0
- γ — Euler-Mascheroni (γ)
- Digit 13,987 = 9
Also seen as
UTF-8 encoding: E3 9A A3 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.54.163.
- Address
- 0.0.54.163
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.54.163
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 13987 first appears in π at position 49,798 of the decimal expansion (the 49,798ordinal-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.