Properties of the Number 19239

Nineteen Thousand Two Hundred Thirty-Nine

Basics

Value: 19238 → 19239 → 19240

Parity: odd

Prime: No

Previous Prime: 19237

Next Prime: 19249

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 11 ² × 53

Divisors: 1, 3, 11, 33, 53, 121, 159, 363, 583, 1749

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101100100111

Octal: 45447

Duodecimal: B173

Hexadecimal: 4b27

Square: 370139121

Square Root: 138.7047223421034

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

Numerator of the probability that 2n-dimensional Gaussian random triangle has an obtuse angle. A102556

a(1) = a(2) = 1; for n>2, a(n+1) = a(n) + a(n-1) iff n is prime, otherwise a(n+1) = a(n) + 1. A113050

a(n) = 2^n-1*((2·n)!/n!) * Integral_t=0..π/3 sin(t)^2·n-1 dt. A123130

Number of connected dominating sets in the n-prism graph. A286985

Denominator of the probability that 2n-dimensional Gaussian random triangle has an obtuse angle. A102557

Triangle read by rows: T(n,k) is the number of labeled 2-connected planar graphs with n nodes and k edges, n >= 3, n <= k <= 3(n-2). A100960

G.f. satisfies: A(x) = 1 + ∑_n>=1 x^n-1*series_reversion( x/A(x)ⁿ ). A125224

Poly-Cauchy numbers of the second kind -hat c₅^-n. A223908

Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite STI = Stilbite Na4Ca8[Al20Si52O144].56H2O starting with a T4 atom. A19239