Live analysis

998,991

998,991 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.).

998,991 (nine hundred ninety-eight thousand nine hundred ninety-one) is an odd 6-digit number. It is a composite number with 24 divisors, and factors as 3² × 7 × 101 × 157. It is the 1,413th triangular number. Written other ways, in hexadecimal, 0xF3E4F.

Arithmetic Number Cube-Free Deficient Number Evil Number Flippable Hexagonal Triangular

Interestingness

★ ★ ★ ☆ ☆

5 notable facts · grade C

998,979 998,980 998,981 998,982 998,983 998,984 998,985 998,986 998,987 998,988 998,989 998,990 998,991 998,992 998,993 998,994 998,995 998,996 998,997 998,998 998,999 999,000 999,001 999,002 999,003

less more

Properties

Parity: Odd
Digit count: 6
Digit sum: 45
Digit product: 52,488
Digital root: 9
Palindrome: No
Bit width: 20 bits
Reversed: 199,899
Flips to (rotate 180°): 166,866
Square (n²): 997,983,018,081
Cube (n³): 996,976,053,215,756,271
Divisor count: 24
σ(n) — sum of divisors: 1,676,064
φ(n) — Euler's totient: 561,600
Sum of prime factors: 271

Primality

Prime factorization: 3 ² × 7 × 101 × 157

Nearest primes: 998,989 (−2) · 999,007 (+16)

Divisors & multiples

All divisors (24)

1 · 3 · 7 · 9 · 21 · 63 · 101 · 157 · 303 · 471 · 707 · 909 · 1099 · 1413 · 2121 · 3297 · 6363 · 9891 · 15857 · 47571 · 110999 · 142713 · 332997 · 998991

Aliquot sum (sum of proper divisors): 677,073

Factor pairs (a × b = 998,991)

1 × 998991

3 × 332997

7 × 142713

9 × 110999

21 × 47571

63 × 15857

101 × 9891

157 × 6363

303 × 3297

471 × 2121

707 × 1413

909 × 1099

First multiples

998,991 · 1,997,982 (double) · 2,996,973 · 3,995,964 · 4,994,955 · 5,993,946 · 6,992,937 · 7,991,928 · 8,990,919 · 9,989,910

Sums & aliquot sequence

As consecutive integers: 499,495 + 499,496 332,996 + 332,997 + 332,998 166,496 + 166,497 + 166,498 + 166,499 + 166,500 + 166,501 142,710 + 142,711 + … + 142,716

Aliquot sequence: 998,991 → 677,073 → 230,127 → 80,913 → 42,415 → 11,585 → 4,351 → 249 → 87 → 33 → 15 → 9 → 4 → 3 → 1 → 0 — terminates at zero

Continued fraction of √n

√998,991 = [999; (2, 53, 1, 1, 8, 1, 3, 1, 4, 1, 10, 1, 6, 3, 1, 1, 1, 2, 1, 3, 9, 1, 1, 2, …)]

Representations

In words: nine hundred ninety-eight thousand nine hundred ninety-one
Ordinal: 998991st
Binary: 11110011111001001111
Octal: 3637117
Hexadecimal: 0xF3E4F
Base64: Dz5P
One's complement: 4,293,968,304 (32-bit)
Scientific notation: 9.98991 × 10⁵
As a duration: 998,991 s = 11 days, 13 hours, 29 minutes, 51 seconds

In other bases

ternary (3) 1212202100200

quaternary (4) 3303321033

quinary (5) 223431431

senary (6) 33224543

septenary (7) 11330340

nonary (9) 1782320

undecimal (11) 622614

duodecimal (12) 402153

tridecimal (13) 28c926

tetradecimal (14) 1c00c7

pentadecimal (15) 14aee6

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹
Egyptian hieroglyphic: 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
Greek (Milesian): ͵ϡϟηϡϟαʹ
Chinese: 九十九萬八千九百九十一
Chinese (financial): 玖拾玖萬捌仟玖佰玖拾壹

In other modern scripts

Eastern Arabic ٩٩٨٩٩١ Devanagari ९९८९९१ Bengali ৯৯৮৯৯১ Tamil ௯௯௮௯௯௧ Thai ๙๙๘๙๙๑ Tibetan ༩༩༨༩༩༡ Khmer ៩៩៨៩៩១ Lao ໙໙໘໙໙໑ Burmese ၉၉၈၉၉၁

Also seen as

Hex color

#0F3E4F

RGB(15, 62, 79)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.15.62.79.

Address: 0.15.62.79
Class: reserved
IPv4-mapped IPv6: ::ffff:0.15.62.79

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 998,991 and was likely granted around 1911.

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

Look up US998,991 on Google Patents ↗ Look up on USPTO ↗