138,739
138,739 is a prime, odd.
138,739 (one hundred thirty-eight thousand seven hundred thirty-nine) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x21DF3.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 31
- Digit product
- 4,536
- Digital root
- 4
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 937,831
- Recamán's sequence
- a(491,349) = 138,739
- Square (n²)
- 19,248,510,121
- Cube (n³)
- 2,670,519,045,677,419
- Divisor count
- 2
- σ(n) — sum of divisors
- 138,740
- φ(n) — Euler's totient
- 138,738
Primality
138,739 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,739 = [372; (2, 10, 3, 2, 1, 2, 2, 1, 1, 4, 2, 2, 2, 1, 3, 2, 5, 12, 1, 7, 1, 2, 1, 4, …)]
Representations
- In words
- one hundred thirty-eight thousand seven hundred thirty-nine
- Ordinal
- 138739th
- Binary
- 100001110111110011
- Octal
- 416763
- Hexadecimal
- 0x21DF3
- Base64
- Ah3z
- One's complement
- 4,294,828,556 (32-bit)
- Scientific notation
- 1.38739 × 10⁵
- As a duration
- 138,739 s = 1 day, 14 hours, 32 minutes, 19 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληψλθʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋰·𝋳
- Chinese
- 一十三萬八千七百三十九
- Chinese (financial)
- 壹拾參萬捌仟柒佰參拾玖
Also seen as
UTF-8 encoding: F0 A1 B7 B3 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.29.243.
- Address
- 0.2.29.243
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.29.243
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 138,739 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
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.