990,991
990,991 is a composite number, odd.
990,991 (nine hundred ninety thousand nine hundred ninety-one) is an odd 6-digit number. It is a composite number with 4 divisors, and factors as 443 × 2,237. Written other ways, in hexadecimal, 0xF1F0F.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 37
- Digit product
- 0
- Digital root
- 1
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 199,099
- Flips to (rotate 180°)
- 166,066
- Square (n²)
- 982,063,162,081
- Cube (n³)
- 973,215,755,053,812,271
- Divisor count
- 4
- σ(n) — sum of divisors
- 993,672
- φ(n) — Euler's totient
- 988,312
- Sum of prime factors
- 2,680
Primality
Prime factorization: 443 × 2237
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√990,991 = [995; (2, 16, 1, 1, 14, 4, 3, 2, 9, 1, 3, 2, 12, 1, 4, 1, 7, 3, 1, 4, 2, 2, 180, 1, …)]
Representations
- In words
- nine hundred ninety thousand nine hundred ninety-one
- Ordinal
- 990991st
- Binary
- 11110001111100001111
- Octal
- 3617417
- Hexadecimal
- 0xF1F0F
- Base64
- Dx8P
- One's complement
- 4,293,976,304 (32-bit)
- Scientific notation
- 9.90991 × 10⁵
- As a duration
- 990,991 s = 11 days, 11 hours, 16 minutes, 31 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵ϡϟϡϟαʹ
- Chinese
- 九十九萬零九百九十一
- Chinese (financial)
- 玖拾玖萬零玖佰玖拾壹
Also seen as
As an unsigned 32-bit integer, this is the IPv4 address 0.15.31.15.
- Address
- 0.15.31.15
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.15.31.15
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 990,991 and was likely granted around 1911.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.