Properties of the Number 79664

Seventy-Nine Thousand Six Hundred Sixty-Four

Basics

Value: 79663 → 79664 → 79665

Parity: even

Prime: No

Previous Prime: 79657

Next Prime: 79669

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 2 ⁴ × 13 × 383

Divisors: 1, 2, 4, 8, 13, 16, 26, 52, 104, 208

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011011100110000

Octal: 233460

Duodecimal: 3A128

Hexadecimal: 13730

Square: 6346352896

Square Root: 282.24811779709

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

G.f. A(x) satisfies: A(x³*R(x)) = x⁴ - x⁵ where A(R(x)) = x. A350434

a(n) is the number of (s(0),s(1),...,s(n)) such that every s(i) is a nonnegative integer, s(0) = 1, s(n) = 1, |s(1) - s(0)| = 1, |s(i) - s(i-1)| <= 1 for i >= 2. Also a(n) = T(n,n), where T is the array in A026120. A26122

Index of first occurrence of n in A000319, or -1 if n never appears there. A381230

Members of a pair (m,k) such that σ(m) = σ(k) = σ(m+k), m < k where σ = A000203. A239436

Number of nX6 0..1 arrays with every element equal to 0, 1, 2, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero. A299946

Sin(tanh(x)*tan(x))/2 = Sum a(n)*x^4·n+2/(4·n+2)!. A9529

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero. A299948

a(n) = ∑_i=1..n LookAndSay(i). A79664