Properties of the Number 13387

Thirteen Thousand Three Hundred Eighty-Seven

Basics

Value: 13386 → 13387 → 13388

Parity: odd

Prime: No

Previous Prime: 13381

Next Prime: 13397

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 11 × 1217

Divisors: 1, 11, 1217, 13387

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11010001001011

Octal: 32113

Duodecimal: 78B7

Hexadecimal: 344b

Square: 179211769

Square Root: 115.70220395480806

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

Sum of 12 nonzero 8th powers. A3390

Values of n such that L(20) and N(20) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A227523

The sums of pairs of adjacent terms are the odd palindromic primes in ascending order. A181881

Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 382", based on the 5-celled von Neumann neighborhood. A281639

Coefficient of·in the reduction by x² -> x+1 of the polynomial p(n,x) defined at Comments. A192972

Numbers k such that A248891(k) = 2. A248902

Regular triangle where T(n,k) is the number of labeled connected multigraphs with loops with n edges and k vertices. A322148

Semiprimes s = A001358(k) such that k, s - k and s + k are also semiprimes. A383468

Numbers n with property that n² is a concatenation of three 3-digit primes. A153139

Irregular triangle: the coefficient [x^k] of the polynomial (1-x)^2·n-1 * ∑_s>=0 A001263(n+2·s,2·s+1)*x^s in row n >= 1 and column k >= 0. A178657