138,987
138,987 is a composite number, odd.
138,987 (one hundred thirty-eight thousand nine hundred eighty-seven) is an odd 6-digit number. It is a composite number with 6 divisors, and factors as 3² × 15,443. Written other ways, in hexadecimal, 0x21EEB.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 36
- Digit product
- 12,096
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 789,831
- Recamán's sequence
- a(490,853) = 138,987
- Square (n²)
- 19,317,386,169
- Cube (n³)
- 2,684,865,551,470,803
- Divisor count
- 6
- σ(n) — sum of divisors
- 200,772
- φ(n) — Euler's totient
- 92,652
- Sum of prime factors
- 15,449
Primality
Prime factorization: 3 2 × 15443
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,987 = [372; (1, 4, 3, 1, 27, 1, 10, 1, 6, 1, 2, 4, 15, 1, 1, 1, 2, 1, 3, 5, 1, 1, 1, 5, …)]
Representations
- In words
- one hundred thirty-eight thousand nine hundred eighty-seven
- Ordinal
- 138987th
- Binary
- 100001111011101011
- Octal
- 417353
- Hexadecimal
- 0x21EEB
- Base64
- Ah7r
- One's complement
- 4,294,828,308 (32-bit)
- Scientific notation
- 1.38987 × 10⁵
- As a duration
- 138,987 s = 1 day, 14 hours, 36 minutes, 27 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληϡπζʹ
- Mayan (base 20)
- 𝋱·𝋧·𝋩·𝋧
- Chinese
- 一十三萬八千九百八十七
- Chinese (financial)
- 壹拾參萬捌仟玖佰捌拾柒
Also seen as
UTF-8 encoding: F0 A1 BB AB (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.30.235.
- Address
- 0.2.30.235
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.30.235
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 138,987 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 138987 first appears in π at position 334,884 of the decimal expansion (the 334,884ordinal-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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.