3,391
3,391 is a prime, odd.
3,391 (three thousand three hundred ninety-one) is an odd 4-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in Roman numerals it is MMMCCCXCI and in binary, 110100111111.
Interestingness
Properties
Primality
3,391 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√3,391 = [58; (4, 3, 3, 1, 1, 2, 1, 6, 7, 1, 1, 1, 1, 1, 1, 57, 1, 1, 1, 1, 1, 1, 7, 6, …)]
Period length 32 — the block in parentheses repeats forever.
Representations
- In words
- three thousand three hundred ninety-one
- Ordinal
- 3391st
- Roman numeral
- MMMCCCXCI
- Binary
- 110100111111
- Octal
- 6477
- Hexadecimal
- 0xD3F
- Base64
- DT8=
- One's complement
- 62,144 (16-bit)
- Scientific notation
- 3.391 × 10³
- As a duration
- 3,391 s = 56 minutes, 31 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆼𓆼𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵γτϟαʹ
- Mayan (base 20)
- 𝋨·𝋩·𝋫
- Chinese
- 三千三百九十一
- Chinese (financial)
- 參仟參佰玖拾壹
Digit at this position in famous constants
- π — Pi (π)
- Digit 3,391 = 2
- e — Euler's number (e)
- Digit 3,391 = 3
- φ — Golden ratio (φ)
- Digit 3,391 = 7
- √2 — Pythagoras's (√2)
- Digit 3,391 = 7
- ln 2 — Natural log of 2
- Digit 3,391 = 5
- γ — Euler-Mascheroni (γ)
- Digit 3,391 = 8
Also seen as
UTF-8 encoding: E0 B4 BF (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.13.63.
- Address
- 0.0.13.63
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.13.63
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 3,391 Hz is closest to:
- Concert pitch (A4 = 440 Hz): G♯7 (3322.4 Hz, +35¢)
- Scientific pitch (C4 = 256 Hz): A7 (3444.3 Hz, -27¢)
- Baroque pitch (A4 = 415 Hz): A7 (3320 Hz, +37¢)
The digit sequence 3391 first appears in π at position 5,588 of the decimal expansion (the 5,588ordinal-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
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.