Properties of the Number -31679

Thirty-One Thousand Six Hundred Seventy-Nine

Basics

Value: -31680 → -31679 → -31678

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 79 × 401

Divisors: 1, 79, 401, 31679

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: -111101110111111

Octal: -75677

Duodecimal: -163BB

Hexadecimal: -7bbf

Square: 1003559041

Square Root: 177.98595450203368

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) = 17ⁿ*cos(2·n*arctan(1/4)) or denominator of tan(2·n*arctan(1/4)). A67361

Values of·such that x² + y² = 17ⁿ with·and y coprime and 0 < x < y. A230622

a(n) = n³ - (n+1)². A153257

Positions in A181391 where the terms listed in A171863 appear. A171864

Number of quadrilateral regions in a "frame" of size n X n (see Comments in A331776 for definition), divided by 8. A332596

a(n) = prime(n) * prime(prime(n)). A73065

a(n) is the smallest k such that number of non-unitary prime divisors of central binomial coefficient, A001405(k) = C(k, floor(k/2)) equals n. A81394

Numbers for which the root mean square of nontrivial divisors is an integer and which are not a square of prime numbers. A247137

a(0)=1; a(1)=1; for n >= 2, a(n) = a(n-1) + a(n-A000005(n)). A320357

Smallest number m such that A226460(m) = n. A226462