Properties of the Number 68688

Sixty-Eight Thousand Six Hundred Eighty-Eight

Basics

Value: 68687 → 68688 → 68689

Parity: even

Prime: No

Previous Prime: 68687

Next Prime: 68699

Digit Sum: 36

Digital Root: 9

Palindrome: No

Factorization: 2 ⁴ × 3 ⁴ × 53

Divisors: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000110001010000

Octal: 206120

Duodecimal: 33900

Hexadecimal: 10c50

Square: 4718041344

Square Root: 262.08395601409865

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

Number of magic and semi-magic squares of order n composed of the numbers from 1 to n², counted up to rotations and reflections. A271103

Numbers that have exactly two exponents in their prime factorization that are equal to 4. A386805

Numbers with prime factorization pq^4r^4. A190012

Numbers with digits 6 and 8 only. A284635

a(n) is the determinant of the 2 X 2 matrix whose entries (when read by rows) are the n-th primes ending in 1, 3, 7, 9 respectively. A335592

Numbers with 50 divisors. A175756

Number of 6-element subsets of {1, 2, ..., n} having pairwise coprime elements. A186982

Number of (w,x,y,z) with all terms in {1,...,n} and |x-y|=|y-z|. A212679

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)=1, k=-1 and l=0. A176855

Number of length n+3 0..5 arrays with some disjoint pairs in every consecutive four terms having the same sum. A247530