Properties of the Number 11817

Eleven Thousand Eight Hundred Seventeen

Basics

Value: 11816 → 11817 → 11818

Parity: odd

Prime: No

Previous Prime: 11813

Next Prime: 11821

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 13 × 101

Divisors: 1, 3, 9, 13, 39, 101, 117, 303, 909, 1313

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10111000101001

Octal: 27051

Duodecimal: 6A09

Hexadecimal: 2e29

Square: 139641489

Square Root: 108.70602559196064

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 partitions of n containing a clique of size 10. A183567

T(n,k)=Number of -k..k arrays of n elements with first and second differences also in -k..k. A201088

Triangles in open triangular matchstick arrangement (triangle minus one side) of side n. A45947

T(n,k) = ∑_d∣k φ(d)*n^k/d/k, triangle read by rows, T(n,k) for n >= 1 and 1 <= k <= n. A54630

Numbers k such that σ(k) = ψ(k) + τ(k) + π(k). A389855

Numbers that are the sum of five third powers in exactly ten ways. A345188

a(n) = number of steps required to reach 0 from F(n+2)-1 by repeatedly subtracting from a natural number the number of ones in its Zeckendorf representation. Here F(n) = the n-th Fibonacci number, F(0) = 0, F(1) = 1, F(2) = 1, F(3) = 2, ... A261081

Number of ways to color vertices of a pentagon using <= n colors, allowing only rotations. A54620

Colombian numbers that are also Bogotá numbers. A336984

Expansion of e.g.f. log(1+x)/cosh(tan(x)). A9433