Properties of the Number 9818

Nine Thousand Eight Hundred Eighteen

Basics

Value: 9817 → 9818 → 9819

Parity: even

Prime: No

Previous Prime: 9817

Next Prime: 9829

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 4909

Divisors: 1, 2, 4909, 9818

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011001011010

Octal: 23132

Duodecimal: 5822

Hexadecimal: 265a

Square: 96393124

Square Root: 99.08582138732059

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

Numbers k such that (10^2·k+1+18·10^k-1)/9 is prime. A107123

Number of n-regular, N₀-weighted pseudographs on 2 vertices with total edge weight 9, up to isomorphism. A358249

Number of free pure symmetric multifunctions with leaves a multiset whose multiplicities are the integer partition with Heinz number n. A317655

Smallest m such that (sum of binary digits of m*(m+1)/2) = n. A211201

Numbers n such that n² + 1 is divisible by a 4th power. A218563

Sum of next n even interprimes. A75675

Sum of composite numbers less than n-th prime. A79725

a(n) = (∑_k=1..n A073698(k))^1/n. A93928

Upper (3/2)-midsequence of binomial(n,3) and binomial(n,2); see Comments. A390343

Numbers k such that the continued fraction for sqrt(k) has period 33. A20372