Properties of the Number 81607

Eighty-One Thousand Six Hundred Seven

Basics

Value: 81606 → 81607 → 81608

Parity: odd

Prime: No

Previous Prime: 81569

Next Prime: 81611

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 79 × 1033

Divisors: 1, 79, 1033, 81607

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111011000111

Octal: 237307

Duodecimal: 3B287

Hexadecimal: 13ec7

Square: 6659702449

Square Root: 285.6693893296935

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

Nonprime numbers whose cototient is a decimal repunits >1 from A002275. A98218

Sequence defined by the recurrence formula a(n+1)=sum(a(p)*a(n-p)+k,p=0..n)+l for n>=1, with here a(0)=1, a(1)=7, k=1 and l=1. A177123

Number of (n+2) X (1+2) 0..1 arrays with no 3·3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 2 and no column sum 2. A255221

Number of numbers <= n having at least one 0 in their ternary representation. A81607