990,021
990,021 is a composite number, odd.
990,021 (nine hundred ninety thousand twenty-one) is an odd 6-digit number. It is a composite number with 8 divisors, and factors as 3 × 331 × 997. Written other ways, in hexadecimal, 0xF1B45.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 21
- Digit product
- 0
- Digital root
- 3
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 120,099
- Square (n²)
- 980,141,580,441
- Cube (n³)
- 970,360,747,609,779,261
- Divisor count
- 8
- σ(n) — sum of divisors
- 1,325,344
- φ(n) — Euler's totient
- 657,360
- Sum of prime factors
- 1,331
Primality
Prime factorization: 3 × 331 × 997
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√990,021 = [994; (1, 496, 2, 496, 1, 1988)]
Period length 6 — the block in parentheses repeats forever.
Representations
- In words
- nine hundred ninety thousand twenty-one
- Ordinal
- 990021st
- Binary
- 11110001101101000101
- Octal
- 3615505
- Hexadecimal
- 0xF1B45
- Base64
- DxtF
- One's complement
- 4,293,977,274 (32-bit)
- Scientific notation
- 9.90021 × 10⁵
- As a duration
- 990,021 s = 11 days, 11 hours, 21 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 · 𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓎆𓎆𓏺
- Greek (Milesian)
- ͵ϡϟκαʹ
- Chinese
- 九十九萬零二十一
- Chinese (financial)
- 玖拾玖萬零貳拾壹
Also seen as
As an unsigned 32-bit integer, this is the IPv4 address 0.15.27.69.
- Address
- 0.15.27.69
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.15.27.69
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 990,021 and was likely granted around 1911.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 990021 first appears in π at position 851,803 of the decimal expansion (the 851,803ordinal-suffix:rd 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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.