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Properties of the Number -13661

Thirteen Thousand Six Hundred Sixty-One

Basics

Value: -13662 → -13661 → -13660

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 19 × 719

Divisors: 1, 19, 719, 13661

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11010101011101

Octal: -32535

Duodecimal: -7AA5

Hexadecimal: -355d

Square: 186622921

Square Root: 116.88028062936878

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

Number of ON cells at n-th stage of three-dimensional version of the cellular automaton A160117 using cubes. A160379
a(n) = ∑k=0..n (-1)k * binomial(3·n+2·k+1,n-k). A390544
Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 934", based on the 5-celled von Neumann neighborhood. A284425
Number of lattice paths from (0,0) to (n,n) consisting of steps U=(1,1), H=(1,0) and S=(0,1) such that the first step leaving the diagonal (if any) is an H step and the last step joining the diagonal (if any) is a S step. A226995
Numerators of continued fraction convergents to sqrt(359). A41680
One-half of the·member of the positive proper fundamental solution (x = x2(n), y = y2(n)) of the second class for the Pell equation x2 - D(n)*y2 = +8 for even D(n) = A264354(n). A264438
Numbers whose sum of divisors is equal to the product of the number of divisors of their k first powers, for some k. A283758
Number of joining pairs of integer partitions of n. A318915
Number of tilings of a 5 X n rectangle using n pentominoes of shapes T, W, I, X. A372221
Numbers k such that 2k + 3k-1 is prime. A82400