138,509
138,509 is a composite number, odd.
138,509 (one hundred thirty-eight thousand five hundred nine) is an odd 6-digit number. It is a composite number with 8 divisors, and factors as 7 × 47 × 421. Written other ways, in hexadecimal, 0x21D0D.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 26
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 905,831
- Recamán's sequence
- a(491,809) = 138,509
- Square (n²)
- 19,184,743,081
- Cube (n³)
- 2,657,259,579,406,229
- Divisor count
- 8
- σ(n) — sum of divisors
- 162,048
- φ(n) — Euler's totient
- 115,920
- Sum of prime factors
- 475
Primality
Prime factorization: 7 × 47 × 421
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,509 = [372; (5, 1, 20, 2, 3, 3, 1, 29, 148, 1, 5, 106, 5, 1, 148, 29, 1, 3, 3, 2, 20, 1, 5, 744)]
Period length 24 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand five hundred nine
- Ordinal
- 138509th
- Binary
- 100001110100001101
- Octal
- 416415
- Hexadecimal
- 0x21D0D
- Base64
- Ah0N
- One's complement
- 4,294,828,786 (32-bit)
- Scientific notation
- 1.38509 × 10⁵
- As a duration
- 138,509 s = 1 day, 14 hours, 28 minutes, 29 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληφθʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋥·𝋩
- Chinese
- 一十三萬八千五百零九
- Chinese (financial)
- 壹拾參萬捌仟伍佰零玖
Also seen as
UTF-8 encoding: F0 A1 B4 8D (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.29.13.
- Address
- 0.2.29.13
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.29.13
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 138,509 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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.