Properties of the Number -13680

Thirteen Thousand Six Hundred Eighty

Basics

Value: -13681 → -13680 → -13679

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ⁴ × 3 ² × 5 × 19

Divisors: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11010101110000

Octal: -32560

Duodecimal: -7B00

Hexadecimal: -3570

Square: 187142400

Square Root: 116.96153213770756

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

Consider the base-7 Kaprekar map n->K(n) defined in A165071. Sequence gives numbers belonging to cycles, including fixed points. A165076

Number of alternately co-strong integer partitions of n. A317256

Consider the base-7 Kaprekar map n->K(n) defined in A165071. Sequence gives numbers belonging to cycles of length greater than 1. A165078

Triangle read by rows: T(n,k) = number of open trails of length k starting and ending at fixed distinct vertices in the complete undirected graph on n labeled vertices, for n >= 1 and k = 0 .. n*(n-1)/2. A357886

Numbers k such that k-1, k+1 and k²+1 are prime numbers. A70155

Number of partitions of 2n into distinct parts < n. A231429

Numbers i such that Fibonacci(i) is divisible by i, i+1, and i+2. A298684

Number of orthogonal 3 X 3 matrices over the ring Z/nZ. A264083

Numbers i such that Fibonacci(i) is divisible by i, i+1, i+2, and i+3. A298685

Numbers k such that sopfr(k + sopfr(k)) = sopfr(k) + sopfr(sopfr(k)), where sopfr = A001414. A376851