Properties of the Number 81873

Eighty-One Thousand Eight Hundred Seventy-Three

Basics

Value: 81872 → 81873 → 81874

Parity: odd

Prime: No

Previous Prime: 81869

Next Prime: 81883

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 11 × 827

Divisors: 1, 3, 9, 11, 33, 99, 827, 2481, 7443, 9097

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111111010001

Octal: 237721

Duodecimal: 3B469

Hexadecimal: 13fd1

Square: 6703188129

Square Root: 286.1345837189206

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

a(n) = 5·2^n-1 - 2 - 3·n. A213387

Number of factorizations of mⁿ into 3 factors, where m is a product of exactly 3 distinct primes and each factor is a product of n primes (counted with multiplicity). A257464

a(n) = floor(exp(17/24)*n!). A30801

a(n) = 2·binomial(n+4, 4) + n + 4. A177206

Ordered semiperimeter of primitive Pythagorean triangles with an odd short leg (or an even long leg). A81873