Live analysis

991,001

991,001 is a composite number, odd.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).

991,001 (nine hundred ninety-one thousand one) is an odd 6-digit number. It is a composite number with 8 divisors, and factors as 11 × 23 × 3,917. Written other ways, in hexadecimal, 0xF1F19.

Arithmetic Number Cube-Free Deficient Number Evil Number Flippable Sphenic Number Squarefree

Interestingness

★ ★ ★ ☆ ☆

5 notable facts · grade C

990,989 990,990 990,991 990,992 990,993 990,994 990,995 990,996 990,997 990,998 990,999 991,000 991,001 991,002 991,003 991,004 991,005 991,006 991,007 991,008 991,009 991,010 991,011 991,012 991,013

less more

Properties

Parity: Odd
Digit count: 6
Digit sum: 20
Digit product: 0
Digital root: 2
Palindrome: No
Bit width: 20 bits
Reversed: 100,199
Flips to (rotate 180°): 100,166
Square (n²): 982,082,982,001
Cube (n³): 973,245,217,245,973,001
Divisor count: 8
σ(n) — sum of divisors: 1,128,384
φ(n) — Euler's totient: 861,520
Sum of prime factors: 3,951

Primality

Prime factorization: 11 × 23 × 3917

Nearest primes: 990,989 (−12) · 991,009 (+8)

Divisors & multiples

All divisors (8)

1 · 11 · 23 · 253 · 3917 · 43087 · 90091 · 991001

Aliquot sum (sum of proper divisors): 137,383

Factor pairs (a × b = 991,001)

1 × 991001

11 × 90091

23 × 43087

253 × 3917

First multiples

991,001 · 1,982,002 (double) · 2,973,003 · 3,964,004 · 4,955,005 · 5,946,006 · 6,937,007 · 7,928,008 · 8,919,009 · 9,910,010

Sums & aliquot sequence

As consecutive integers: 495,500 + 495,501 90,086 + 90,087 + … + 90,096 45,035 + 45,036 + … + 45,056 43,076 + 43,077 + … + 43,098

Aliquot sequence: 991,001 → 137,383 → 1 → 0 — terminates at zero

Continued fraction of √n

√991,001 = [995; (2, 25, 2, 1, 4, 40, 2, 2, 1, 1, 4, 27, 1, 4, 1, 2, 12, 11, 23, 1, 8, 1, 3, 17, …)]

Representations

In words: nine hundred ninety-one thousand one
Ordinal: 991001st
Binary: 11110001111100011001
Octal: 3617431
Hexadecimal: 0xF1F19
Base64: Dx8Z
One's complement: 4,293,976,294 (32-bit)
Scientific notation: 9.91001 × 10⁵
As a duration: 991,001 s = 11 days, 11 hours, 16 minutes, 41 seconds

In other bases

ternary (3) 1212100101202

quaternary (4) 3301330121

quinary (5) 223203001

senary (6) 33123545

septenary (7) 11265134

nonary (9) 1770352

undecimal (11) 617610

duodecimal (12) 3b95b5

tridecimal (13) 2890bb

tetradecimal (14) 1bb21b

pentadecimal (15) 14896b

As an angle

991,001° = 2,752 × 360° + 281°

281° ≈ 4.904 rad

Compass bearing: W (west)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
Egyptian hieroglyphic: 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓏺
Greek (Milesian): ͵ϡϟααʹ
Chinese: 九十九萬一千零一
Chinese (financial): 玖拾玖萬壹仟零壹

In other modern scripts

Eastern Arabic ٩٩١٠٠١ Devanagari ९९१००१ Bengali ৯৯১০০১ Tamil ௯௯௧௦௦௧ Thai ๙๙๑๐๐๑ Tibetan ༩༩༡༠༠༡ Khmer ៩៩១០០១ Lao ໙໙໑໐໐໑ Burmese ၉၉၁၀၀၁

Also seen as

Hex color

#0F1F19

RGB(15, 31, 25)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.15.31.25.

Address: 0.15.31.25
Class: reserved
IPv4-mapped IPv6: ::ffff:0.15.31.25

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Possible US patent number

This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 991,001 and was likely granted around 1911.

Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.

Look up US991,001 on Google Patents ↗ Look up on USPTO ↗

Position in π

The digit sequence 991001 first appears in π at position 334,093 of the decimal expansion (the 334,093ordinal-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.

Look up 991001 on Pi Search ↗