Properties of the Number 9812

Nine Thousand Eight Hundred Twelve

Basics

Value: 9811 → 9812 → 9813

Parity: even

Prime: No

Previous Prime: 9811

Next Prime: 9817

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 11 × 223

Divisors: 1, 2, 4, 11, 22, 44, 223, 446, 892, 2453

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 10011001010100

Octal: 23124

Duodecimal: 5818

Hexadecimal: 2654

Square: 96275344

Square Root: 99.05553997631834

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 (3,3,4) tiling of hyperbolic plane. A265071

Numbers n such that Bernoulli number B_n has denominator 690. A272186

Numbers k for which 8·R_k + 1 is prime, where R_k = 11...1 is the repunit (A002275) of length k. A96508

Number of primes of the form 30k + 7 less than 10ⁿ. A91166

Number of compositions (ordered partitions) of n into heptagonal numbers (A000566). A322799

Number of Aut(G)-orbits on G-characters that come from Riemann surfaces of genus n. A347373

a(n) = 5·n² + 3·n. A126264

Number of ways to pair up {2..2n+1} so the sum of each pair is prime. A134293

a(n) = 121·n² + 11. A158536

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 18. A31696