Properties of the Number -13887

Thirteen Thousand Eight Hundred Eighty-Seven

Basics

Value: -13888 → -13887 → -13886

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 1543

Divisors: 1, 3, 9, 1543, 4629, 13887

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11011000111111

Octal: -33077

Duodecimal: -8053

Hexadecimal: -363f

Square: 192848769

Square Root: 117.84311604841413

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

Coordination sequence for (2,4,5) tiling of hyperbolic plane. A265060

Sum of first 2n primes. A109722

Expansion of (3 + x²) / (1 - x)⁴. A37237

Numbers k such that 6·p(k)*p(k+1)*p(k+2)*p(k+3)*p(k+4)-1 and 6·p(k)*p(k+1)*p(k+2)*p(k+3)*p(k+4)+1 are twin primes with p(h) = h-th prime. A129310

Sum of primes < n². A139562

Number of solutions to the Diophantine equation x1·x2 + x2·x3 + x3·x4 + x4·x5 + x5·x6 = n, with all ξ >= 1. A191832

G.f. A(x,y) satisfies: A(x,y) = x + A( x² + x·y*A(x,y)², y). A271868

Number of n X 3 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero. A316422

Successive sums of consecutive primes that form a triangular grid. A125130

n-th prime·8-7 is the square of a prime. A169583