Properties of the Number 6839

Six Thousand Eight Hundred Thirty-Nine

Basics

Value: 6838 → 6839 → 6840

Parity: odd

Prime: No

Previous Prime: 6833

Next Prime: 6841

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 7 × 977

Divisors: 1, 7, 977, 6839

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101010110111

Octal: 15267

Duodecimal: 3B5B

Hexadecimal: 1ab7

Square: 46771921

Square Root: 82.6982466561414

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(n) = n*(5·n² - 3)/2. A63522

Sum T(n,k) of the entries in the k-th blocks of all set partitions of [n]; triangle T(n,k), n>=1, 1<=k<=n, read by rows. A285362

a(n) = n³ - n - 1. A126420

Number of partitions of n into partition numbers. A7279

Alternate partial sums of binomial(3n,n)². A188680

Number of twice-partitions of n of odd length. A358824

Expansion of 1/((1+x)*(1-2·x+2·x²-2·x³)). A52942

Expansion of e.g.f. 1 / (1 - log(1 - x)⁴ / 4!). A346923

Expansion of e.g.f. exp(x + ∑_k>=2 prime(k-1)*x^k/k!). A300632

Numbers k such that k and 8·k, taken together, are zeroless pandigital. A115932