Properties of the Number 6939

Six Thousand Nine Hundred Thirty-Nine

Basics

Value: 6938 → 6939 → 6940

Parity: odd

Prime: No

Previous Prime: 6917

Next Prime: 6947

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 257

Divisors: 1, 3, 9, 27, 257, 771, 2313, 6939

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1101100011011

Octal: 15433

Duodecimal: 4023

Hexadecimal: 1b1b

Square: 48149721

Square Root: 83.30066026148893

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

Expansion of (1 - 3·x - sqrt((1-3·x)² - 4·3*x²))/(2·3*x²). A107264

a(1) = 3; a(n) is smallest number >= a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime. A33681

a(1) = 2; a(n) is smallest number > a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime. A74338

T(n,k) = Number of lower triangles of an n X n integer array with each element differing from all of its vertical and horizontal neighbors by k or less and triangles differing by a constant counted only once. A195278

T(n,k)=Petersen graph (3,1) coloring a rectangular array: number of nXk 0..5 arrays where 0..5 label nodes of a graph with edges 0,1 0,3 3,5 3,4 1,2 1,4 4,5 2,0 2,5 and every array movement to a horizontal or antidiagonal neighbor moves along an edge of this graph, with the array starting at 0. A223556

A square array of Motzkin related transforms, read by antidiagonals. A107267

a(1) = 1; for n>1, a(n) = least k such that concatenation of n copies of k with all previous concatenations gives a prime. A111471

A249183 seen as binary numbers. A249184

Number of distinct residues of xⁿ (mod n⁴), x=0..n⁴-1. A365101

Family 1 "Rule 90·Rule 150 Array" read by antidiagonals. A48710