Properties of the Number 68978

Sixty-Eight Thousand Nine Hundred Seventy-Eight

Basics

Value: 68977 → 68978 → 68979

Parity: even

Prime: No

Previous Prime: 68963

Next Prime: 68993

Digit Sum: 38

Digital Root: 2

Palindrome: No

Factorization: 2 × 7 × 13 × 379

Divisors: 1, 2, 7, 13, 14, 26, 91, 182, 379, 758

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000110101110010

Octal: 206562

Duodecimal: 33B02

Hexadecimal: 10d72

Square: 4757964484

Square Root: 262.63663110845755

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(1)=2; for n > 1, a(n) is the square root of the smallest square with a(n-1) as a prefix in base 10. A308055

First gap of length at least n in A007951, lower end. A139387

Number of (n+1) X 5 0..1 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) nondecreasing in column and row directions, respectively. A204647

Numbers k such that ∑_d∣k τ(d)/d is an integer, where τ(x) = A000005(x). A68978