Properties of the Number 72813

Seventy-Two Thousand Eight Hundred Thirteen

Basics

Value: 72812 → 72813 → 72814

Parity: odd

Prime: No

Previous Prime: 72797

Next Prime: 72817

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 13 × 1867

Divisors: 1, 3, 13, 39, 1867, 5601, 24271, 72813

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001110001101101

Octal: 216155

Duodecimal: 36179

Hexadecimal: 11c6d

Square: 5301732969

Square Root: 269.838840792055

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

Crystal ball sequence for hexagonal close-packing. A7202

a(n+1) is the smallest number > a(n) such that the digits of a(n)² are all (with multiplicity) contained in the digits of a(n+1)², with a(0)=1. A14563

Number of compositions of n into parts with distinct multiplicities and with exactly nine parts. A321779

Numbers k such that 199·2^k-1 is prime. A50851

a(n) = smallest number greater than a(n-1) having a largest proper divisor that is greater than and coprime to a(n-1); a(1) = 1. A98144

a(n)^A072814(n) is the n-th perfect power. A72813

a(n) is the number of edges of a regular polygon P with the property that packing n nonoverlapping equal circles inside P, arranged in a configuration with dihedral symmetry D_2m with m >= 3, maximizes the packing density. A343262