Properties of the Number 68645

Sixty-Eight Thousand Six Hundred Forty-Five

Basics

Value: 68644 → 68645 → 68646

Parity: odd

Prime: No

Previous Prime: 68639

Next Prime: 68659

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 5 × 13729

Divisors: 1, 5, 13729, 68645

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000110000100101

Octal: 206045

Duodecimal: 33885

Hexadecimal: 10c25

Square: 4712136025

Square Root: 262.0019083899963

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

a(0) = 1; a(n) = ∑_{0 <= k < n and gcd(k,n) = 1} a(k). A45545

a(n) = 4·prime(n)²+1. A60429

Primes in which a string of 3's is sandwiched between two 1's. A68645