19,009
19,009 is a prime, odd.
19,009 (nineteen thousand nine) is an odd 5-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x4A41.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 19
- Digit product
- 0
- Digital root
- 1
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 90,091
- Flips to (rotate 180°)
- 60,061
- Square (n²)
- 361,342,081
- Cube (n³)
- 6,868,751,617,729
- Divisor count
- 2
- σ(n) — sum of divisors
- 19,010
- φ(n) — Euler's totient
- 19,008
Primality
19,009 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√19,009 = [137; (1, 6, 1, 7, 2, 12, 1, 1, 1, 17, 1, 2, 1, 1, 1, 2, 1, 4, 3, 2, 6, 1, 1, 1, …)]
Representations
- In words
- nineteen thousand nine
- Ordinal
- 19009th
- Binary
- 100101001000001
- Octal
- 45101
- Hexadecimal
- 0x4A41
- Base64
- SkE=
- One's complement
- 46,526 (16-bit)
- Scientific notation
- 1.9009 × 10⁴
- As a duration
- 19,009 s = 5 hours, 16 minutes, 49 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ιθθʹ
- Mayan (base 20)
- 𝋢·𝋧·𝋪·𝋩
- Chinese
- 一萬九千零九
- Chinese (financial)
- 壹萬玖仟零玖
Digit at this position in famous constants
- π — Pi (π)
- Digit 19,009 = 6
- e — Euler's number (e)
- Digit 19,009 = 9
- φ — Golden ratio (φ)
- Digit 19,009 = 7
- √2 — Pythagoras's (√2)
- Digit 19,009 = 4
- ln 2 — Natural log of 2
- Digit 19,009 = 3
- γ — Euler-Mascheroni (γ)
- Digit 19,009 = 3
Also seen as
UTF-8 encoding: E4 A9 81 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.74.65.
- Address
- 0.0.74.65
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.74.65
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 19,009 Hz is closest to:
- Concert pitch (A4 = 440 Hz): D10 (18794.5 Hz, +20¢)
- Scientific pitch (C4 = 256 Hz): D♯10 (19484 Hz, -43¢)
- Baroque pitch (A4 = 415 Hz): D♯10 (18780.8 Hz, +21¢)
The digit sequence 19009 first appears in π at position 14,832 of the decimal expansion (the 14,832ordinal-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.
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.