Properties of the Number 68191

Sixty-Eight Thousand One Hundred Ninety-One

Basics

Value: 68190 → 68191 → 68192

Parity: odd

Prime: No

Previous Prime: 68171

Next Prime: 68207

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 19 × 37 × 97

Divisors: 1, 19, 37, 97, 703, 1843, 3589, 68191

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000101001011111

Octal: 205137

Duodecimal: 33567

Hexadecimal: 10a5f

Square: 4650012481

Square Root: 261.1340651849161

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

10-gonal (or decagonal) pyramidal numbers: a(n) = n*(n + 1)*(8·n - 5)/6. A7585

Expansion of ∏_k>=1 1/(1 - k·x^k²)^k. A285243

Number of compositions of n such that the smallest part has multiplicity two. A241862

Minimal number of moves for the cyclic variant of the Towers of Hanoi for 3 pegs and n disks, with the final peg two steps away. A5666

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 63 ones. A31831

Composite numbers which in base 6 contain their largest proper factor as a substring. A63156

Odd decagonal pyramidal numbers. A218330

Numbers n such that A067734(n)=0; complement of A002473; at least one prime-factor of n is larger than 7, it has 2 decimal digits. A68191