13,643
13,643 is a composite number, odd.
13,643 (thirteen thousand six hundred forty-three) is an odd 5-digit number. It is a composite number with 4 divisors, and factors as 7 × 1,949. Written other ways, in hexadecimal, 0x354B.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 17
- Digit product
- 216
- Digital root
- 8
- Palindrome
- No
- Bit width
- 14 bits
- Reversed
- 34,631
- Recamán's sequence
- a(4,058) = 13,643
- Square (n²)
- 186,131,449
- Cube (n³)
- 2,539,391,358,707
- Divisor count
- 4
- σ(n) — sum of divisors
- 15,600
- φ(n) — Euler's totient
- 11,688
- Sum of prime factors
- 1,956
Primality
Prime factorization: 7 × 1949
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√13,643 = [116; (1, 4, 12, 10, 1, 1, 6, 2, 1, 7, 2, 1, 2, 5, 1, 15, 1, 5, 2, 1, 2, 7, 1, 2, …)]
Period length 32 — the block in parentheses repeats forever.
Representations
- In words
- thirteen thousand six hundred forty-three
- Ordinal
- 13643rd
- Binary
- 11010101001011
- Octal
- 32513
- Hexadecimal
- 0x354B
- Base64
- NUs=
- One's complement
- 51,892 (16-bit)
- Scientific notation
- 1.3643 × 10⁴
- As a duration
- 13,643 s = 3 hours, 47 minutes, 23 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺
- Greek (Milesian)
- ͵ιγχμγʹ
- Mayan (base 20)
- 𝋡·𝋮·𝋢·𝋣
- Chinese
- 一萬三千六百四十三
- Chinese (financial)
- 壹萬參仟陸佰肆拾參
Digit at this position in famous constants
- π — Pi (π)
- Digit 13,643 = 1
- e — Euler's number (e)
- Digit 13,643 = 9
- φ — Golden ratio (φ)
- Digit 13,643 = 6
- √2 — Pythagoras's (√2)
- Digit 13,643 = 2
- ln 2 — Natural log of 2
- Digit 13,643 = 9
- γ — Euler-Mascheroni (γ)
- Digit 13,643 = 0
Also seen as
UTF-8 encoding: E3 95 8B (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.53.75.
- Address
- 0.0.53.75
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.53.75
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 13,643 Hz is closest to:
- Concert pitch (A4 = 440 Hz): G♯9 (13289.8 Hz, +45¢ — about midway to A9)
- Scientific pitch (C4 = 256 Hz): A9 (13777.2 Hz, -17¢)
- Baroque pitch (A4 = 415 Hz): A9 (13280 Hz, +47¢ — about midway to A♯9)
The digit sequence 13643 first appears in π at position 80,165 of the decimal expansion (the 80,165ordinal-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.