Properties of the Number 81729

Eighty-One Thousand Seven Hundred Twenty-Nine

Basics

Value: 81728 → 81729 → 81730

Parity: odd

Prime: No

Previous Prime: 81727

Next Prime: 81737

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 1009

Divisors: 1, 3, 9, 27, 81, 1009, 3027, 9081, 27243, 81729

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111101000001

Octal: 237501

Duodecimal: 3B369

Hexadecimal: 13f41

Square: 6679629441

Square Root: 285.88284313683465

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

Concatenation of n² and n³. A239460

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (1, -1, 0), (1, 0, 1), (1, 1, -1)}. A148960

a(n) = A239460(n) / n². A239463

Expansion of Sum(k>=0, x^{2^k}) + 1/(1+x). First differences of A007456 (gossip sequence) for n>1. A81729