Live analysis

4,491

4,491 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.).

4,491 (four thousand four hundred ninety-one) is an odd 4-digit number. It is a composite number with 6 divisors, and factors as 3² × 499. Written other ways, in hexadecimal, 0x118B.

Cube-Free Deficient Number Evil Number Recamán's Sequence

Interestingness

★ ☆ ☆ ☆ ☆

2 notable facts · grade F

4,479 4,480 4,481 4,482 4,483 4,484 4,485 4,486 4,487 4,488 4,489 4,490 4,491 4,492 4,493 4,494 4,495 4,496 4,497 4,498 4,499 4,500 4,501 4,502 4,503

less more

Properties

Parity: Odd
Digit count: 4
Digit sum: 18
Digit product: 144
Digital root: 9
Palindrome: No
Bit width: 13 bits
Reversed: 1,944
Recamán's sequence: a(5,758) = 4,491
Square (n²): 20,169,081
Cube (n³): 90,579,342,771
Divisor count: 6
σ(n) — sum of divisors: 6,500
φ(n) — Euler's totient: 2,988
Sum of prime factors: 505

Primality

Prime factorization: 3 ² × 499

Nearest primes: 4,483 (−8) · 4,493 (+2)

Divisors & multiples

All divisors (6)

1 · 3 · 9 · 499 · 1497 · 4491

Aliquot sum (sum of proper divisors): 2,009

Factor pairs (a × b = 4,491)

1 × 4491

3 × 1497

9 × 499

First multiples

4,491 · 8,982 (double) · 13,473 · 17,964 · 22,455 · 26,946 · 31,437 · 35,928 · 40,419 · 44,910

Sums & aliquot sequence

As consecutive integers: 2,245 + 2,246 1,496 + 1,497 + 1,498 746 + 747 + 748 + 749 + 750 + 751 495 + 496 + … + 503

Aliquot sequence: 4,491 → 2,009 → 385 → 191 → 1 → 0 — terminates at zero

Continued fraction of √n

√4,491 = [67; (67, 134)]

Period length 2 — the block in parentheses repeats forever.

Representations

In words: four thousand four hundred ninety-one
Ordinal: 4491st
Binary: 1000110001011
Octal: 10613
Hexadecimal: 0x118B
Base64: EYs=
One's complement: 61,044 (16-bit)
Scientific notation: 4.491 × 10³
As a duration: 4,491 s = 1 hour, 14 minutes, 51 seconds

In other bases

ternary (3) 20011100

quaternary (4) 1012023

quinary (5) 120431

senary (6) 32443

septenary (7) 16044

nonary (9) 6140

undecimal (11) 3413

duodecimal (12) 2723

tridecimal (13) 2076

tetradecimal (14) 18cb

pentadecimal (15) 14e6

As an angle

4,491° = 12 × 360° + 171°

171° ≈ 2.985 rad

Compass bearing: S (south)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹 𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹
Egyptian hieroglyphic: 𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
Greek (Milesian): ͵δυϟαʹ
Mayan (base 20): 𝋫·𝋤·𝋫
Chinese: 四千四百九十一
Chinese (financial): 肆仟肆佰玖拾壹

In other modern scripts

Eastern Arabic ٤٤٩١ Devanagari ४४९१ Bengali ৪৪৯১ Tamil ௪௪௯௧ Thai ๔๔๙๑ Tibetan ༤༤༩༡ Khmer ៤៤៩១ Lao ໔໔໙໑ Burmese ၄၄၉၁

Digit at this position in famous constants

π — Pi (π): Digit 4,491 = 3
e — Euler's number (e): Digit 4,491 = 1
φ — Golden ratio (φ): Digit 4,491 = 7
√2 — Pythagoras's (√2): Digit 4,491 = 6
ln 2 — Natural log of 2: Digit 4,491 = 0
γ — Euler-Mascheroni (γ): Digit 4,491 = 6

Also seen as

Unicode codepoint

ᆋ

Hangul Jungseong U-Eo-Eu

U+118B

Other letter (Lo)

UTF-8 encoding: E1 86 8B (3 bytes).

Lookup U+118B on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00118B

RGB(0, 17, 139)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.17.139.

Address: 0.0.17.139
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.17.139

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

Musical pitch

Heard as a frequency, 4,491 Hz is closest to:

Concert pitch (A4 = 440 Hz): C♯8 (4434.9 Hz, +22¢)
Scientific pitch (C4 = 256 Hz): D8 (4597.6 Hz, -41¢)
Baroque pitch (A4 = 415 Hz): D8 (4431.7 Hz, +23¢)

Position in π

The digit sequence 4491 first appears in π at position 20,989 of the decimal expansion (the 20,989ordinal-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.

Look up 4491 on Pi Search ↗