Properties of the Number 79781

Seventy-Nine Thousand Seven Hundred Eighty-One

Basics

Value: 79780 → 79781 → 79782

Parity: odd

Prime: No

Previous Prime: 79777

Next Prime: 79801

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 13 × 17 × 19 ²

Divisors: 1, 13, 17, 19, 221, 247, 323, 361, 4199, 4693

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011011110100101

Octal: 233645

Duodecimal: 3A205

Hexadecimal: 137a5

Square: 6365007961

Square Root: 282.4553061990516

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

Triangle T(n,k) read by rows: number of k X k triangular matrices with nonnegative integer entries and without zero rows or columns such that sum of all entries is equal to n, n>=1, 1<=k<=n. A137251

Expansion of (1-x)*(1-2·x)*(1-3·x)/(1-9·x+28·x²-35·x³+15·x⁴-x⁵). A224509

Number of n X 3 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 2 and every value increasing by 0 or 1 with every step right, diagonally se or down. A252978

Initial term of n-th row of triangle in A079784. A79781