Properties of the Number 78939

Seventy-Eight Thousand Nine Hundred Thirty-Nine

Basics

Value: 78938 → 78939 → 78940

Parity: odd

Prime: No

Previous Prime: 78929

Next Prime: 78941

Digit Sum: 36

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 7 ² × 179

Divisors: 1, 3, 7, 9, 21, 49, 63, 147, 179, 441

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10011010001011011

Octal: 232133

Duodecimal: 39823

Hexadecimal: 1345b

Square: 6231365721

Square Root: 280.9608513654527

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

Numbers k such that (k, σ(k)) lies on a circle with integral radius centered at the origin, i.e., k² + σ(k)² is a square. A66764

Array defined in A064643 read from left to right (cf. A107783). A64644

Array defined in A064643 read in direction in which it was created. A107783

Number of multisets of nonempty words with a total of n letters over 7-ary alphabet such that within each word every letter of the alphabet is at least as frequent as the subsequent alphabet letter. A292722

Expansion of 1/((1-2x)(1-4x)(1-7x)(1-12x)). A25975

Fourth power of lower triangular matrix of A056857 (successive equalities in set partitions of n). A78939

Number A(n,k) of multisets of nonempty words with a total of n letters over k-ary alphabet such that within each word every letter of the alphabet is at least as frequent as the subsequent alphabet letter; square array A(n,k), n>=0, k>=0, read by antidiagonals. A292712

Factors k > 2 such that the polynomial x² + k·x + 1 produces a new minimum of its Hardy-Littlewood constant. A332707