Properties of the Number 81662

Eighty-One Thousand Six Hundred Sixty-Two

Basics

Value: 81661 → 81662 → 81663

Parity: even

Prime: No

Previous Prime: 81649

Next Prime: 81667

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 7 × 19 × 307

Divisors: 1, 2, 7, 14, 19, 38, 133, 266, 307, 614

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111011111110

Octal: 237376

Duodecimal: 3B312

Hexadecimal: 13efe

Square: 6668682244

Square Root: 285.7656382422491

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

Numbers k such that k and k² use only the digits 1, 2, 4, 6 and 8. A136994

Partial sums of n + Fibonacci(n+1). A81662