Number

6,491

6,491 is a prime, odd.

Arithmetic Number Chen Prime Deficient Number Evil Number Prime Recamán's Sequence Sophie Germain Prime Squarefree

Properties

Parity: Odd
Digit count: 4
Digit sum: 20
Digit product: 216
Digital root: 2
Palindrome: No
Bit width: 13 bits
Reversed: 1,946
Recamán's sequence: a(53,417) = 6,491
Square (n²): 42,133,081
Cube (n³): 273,485,828,771
Divisor count: 2
σ(n) — sum of divisors: 6,492
φ(n) — Euler's totient: 6,490

Primality

6,491 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 6491

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 6,491)

1 × 6491

First multiples

6,491 · 12,982 (double) · 19,473 · 25,964 · 32,455 · 38,946 · 45,437 · 51,928 · 58,419 · 64,910

Sums & aliquot sequence

As consecutive integers: 3,245 + 3,246

Representations

In words: six thousand four hundred ninety-one
Ordinal: 6491st
Binary: 1100101011011
Octal: 14533
Hexadecimal: 0x195B
Base64: GVs=
One's complement: 59,044 (16-bit)

In other bases

ternary (3) 22220102

quaternary (4) 1211123

quinary (5) 201431

senary (6) 50015

septenary (7) 24632

nonary (9) 8812

undecimal (11) 4971

duodecimal (12) 390b

tridecimal (13) 2c54

tetradecimal (14) 2519

pentadecimal (15) 1dcb

Historical numeral systems

Babylonian (base 60): 𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹
Egyptian hieroglyphic: 𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
Greek (Milesian): ͵ϛυϟαʹ
Mayan (base 20): 𝋰·𝋤·𝋫
Chinese: 六千四百九十一
Chinese (financial): 陸仟肆佰玖拾壹

In other modern scripts

Eastern Arabic ٦٤٩١ Devanagari ६४९१ Bengali ৬৪৯১ Tamil ௬௪௯௧ Thai ๖๔๙๑ Tibetan ༦༤༩༡ Khmer ៦៤៩១ Lao ໖໔໙໑ Burmese ၆၄၉၁

Digit at this position in famous constants

π — Pi (π): Digit 6,491 = 3
e — Euler's number (e): Digit 6,491 = 0
φ — Golden ratio (φ): Digit 6,491 = 8
√2 — Pythagoras's (√2): Digit 6,491 = 4
ln 2 — Natural log of 2: Digit 6,491 = 9
γ — Euler-Mascheroni (γ): Digit 6,491 = 0

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 6,481 (gap of 10)
Next prime: 6,521 (gap of 30)

Unicode codepoint

ᥛ

Tai Le Letter Ma

U+195B

Other letter (Lo)

UTF-8 encoding: E1 A5 9B (3 bytes).

Lookup U+195B on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00195B

RGB(0, 25, 91)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.25.91.

Address: 0.0.25.91
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.25.91

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

Position in π

The digit sequence 6491 first appears in π at position 7,009 of the decimal expansion (the 7,009ordinal-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 6491 on Pi Search ↗