Properties of the Number 81007

Eighty-One Thousand Seven

Basics

Value: 81006 → 81007 → 81008

Parity: odd

Prime: No

Previous Prime: 81001

Next Prime: 81013

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 59 × 1373

Divisors: 1, 59, 1373, 81007

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110001101111

Octal: 236157

Duodecimal: 3AA67

Hexadecimal: 13c6f

Square: 6562134049

Square Root: 284.6172868959298

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

Least integer k such that k/2ⁿ > 1/φ, where φ = (1+sqrt(5))/2 = golden ratio. A293323

The integer k that minimizes |k/2ⁿ - 1/φ|, where φ = (1+sqrt(5))/2 = golden ratio. A293324

a(n) = Fibonacci(4n+1) - 1, or Fibonacci(2n)*Lucas(2n+1). A81007