Properties of the Number 81393

Eighty-One Thousand Three Hundred Ninety-Three

Basics

Value: 81392 → 81393 → 81394

Parity: odd

Prime: No

Previous Prime: 81373

Next Prime: 81401

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 13 × 2087

Divisors: 1, 3, 13, 39, 2087, 6261, 27131, 81393

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110111110001

Octal: 236761

Duodecimal: 3B129

Hexadecimal: 13df1

Square: 6624820449

Square Root: 285.29458459634316

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

G.f. satisfies: A(x) = ∑_n>=0 xⁿ*A(x)^4·n². A191802

a(n) is the smallest k such that number of non-unitary prime divisors of central binomial coefficient, A000984(k) = C(2·k,k) equals n. A81393