Number

91,121

91,121 is a prime, odd.

91,121 (ninety-one thousand one hundred twenty-one) is an odd 5-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x163F1.

Arithmetic Number Chen Prime Cube-Free Deficient Number Emirp Evil Number Prime Pythagorean Prime Recamán's Sequence Sexy Prime Sophie Germain Prime Squarefree

Interestingness

★ ★ ★ ★ ★

10 notable facts · grade A

91,109 91,110 91,111 91,112 91,113 91,114 91,115 91,116 91,117 91,118 91,119 91,120 91,121 91,122 91,123 91,124 91,125 91,126 91,127 91,128 91,129 91,130 91,131 91,132 91,133

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Properties

Parity: Odd
Digit count: 5
Digit sum: 14
Digit product: 18
Digital root: 5
Palindrome: No
Bit width: 17 bits
Reversed: 12,119
Recamán's sequence: a(262,530) = 91,121
Square (n²): 8,303,036,641
Cube (n³): 756,581,001,764,561
Divisor count: 2
σ(n) — sum of divisors: 91,122
φ(n) — Euler's totient: 91,120

Primality

91,121 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 91121

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 91,121)

1 × 91121

First multiples

91,121 · 182,242 (double) · 273,363 · 364,484 · 455,605 · 546,726 · 637,847 · 728,968 · 820,089 · 911,210

Sums & aliquot sequence

As a sum of two squares: 64² + 295²

As consecutive integers: 45,560 + 45,561

Continued fraction of √n

√91,121 = [301; (1, 6, 3, 1, 1, 1, 2, 2, 1, 1, 10, 5, 6, 2, 3, 1, 1, 6, 1, 1, 5, 1, 4, 1, …)]

Representations

In words: ninety-one thousand one hundred twenty-one
Ordinal: 91121st
Binary: 10110001111110001
Octal: 261761
Hexadecimal: 0x163F1
Base64: AWPx
One's complement: 4,294,876,174 (32-bit)
Scientific notation: 9.1121 × 10⁴
As a duration: 91,121 s = 1 day, 1 hour, 18 minutes, 41 seconds

In other bases

ternary (3) 11121222212

quaternary (4) 112033301

quinary (5) 10403441

senary (6) 1541505

septenary (7) 526442

nonary (9) 147885

undecimal (11) 62508

duodecimal (12) 44895

tridecimal (13) 32624

tetradecimal (14) 252c9

pentadecimal (15) 1beeb

As an angle

91,121° = 253 × 360° + 41°

41° ≈ 0.716 rad

Compass bearing: NE (northeast)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
Egyptian hieroglyphic: 𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓍢𓎆𓎆𓏺
Greek (Milesian): ͵ϟαρκαʹ
Mayan (base 20): 𝋫·𝋧·𝋰·𝋡
Chinese: 九萬一千一百二十一
Chinese (financial): 玖萬壹仟壹佰貳拾壹

In other modern scripts

Eastern Arabic ٩١١٢١ Devanagari ९११२१ Bengali ৯১১২১ Tamil ௯௧௧௨௧ Thai ๙๑๑๒๑ Tibetan ༩༡༡༢༡ Khmer ៩១១២១ Lao ໙໑໑໒໑ Burmese ၉၁၁၂၁

Digit at this position in famous constants

π — Pi (π): Digit 91,121 = 8
e — Euler's number (e): Digit 91,121 = 0
φ — Golden ratio (φ): Digit 91,121 = 8
√2 — Pythagoras's (√2): Digit 91,121 = 2
ln 2 — Natural log of 2: Digit 91,121 = 6
γ — Euler-Mascheroni (γ): Digit 91,121 = 8

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 91,099 (gap of 22)
Next prime: 91,127 (gap of 6)

Pair status: sexy with 91127.

Hex color

#0163F1

RGB(1, 99, 241)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.1.99.241.

Address: 0.1.99.241
Class: reserved
IPv4-mapped IPv6: ::ffff:0.1.99.241

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

Position in π

The digit sequence 91121 first appears in π at position 75,801 of the decimal expansion (the 75,801ordinal-suffix:st 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 91121 on Pi Search ↗