Properties of the Number -839

Eight Hundred Thirty-Nine

Basics

Value: -840 → -839 → -838

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 839

Divisors: 1, 839

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: -1101000111

Octal: -1507

Duodecimal: -59B

Hexadecimal: -347

Square: 703921

Square Root: 28.965496715920477

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

Second differences of A000463; first differences of A188652. A188653

a(n) = ∑_k=0..n A105595(k)*(-1)^k*A105595(n-k) (interpolated zeros suppressed). A105596

Expansion of (1-5·x-x²+x³)/((1+x)*(1-x)³). A141354

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the symmetric matrix A203003; by antidiagonals. A203004

a(n) = n! * ∑_{k=0..floor(n/4)} (-1)^k / (n-4·k)!. A337751

Diagonal sums of triangle A110324. A110326

a(n) = 1 - 4·n - 4·n². A184882

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 65", based on the 5-celled von Neumann neighborhood. A270086

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 323", based on the 5-celled von Neumann neighborhood. A271256

Expansion of e.g.f. exp(x * (1 - x³)). A351905