Properties of the Number 91806

Ninety-One Thousand Eight Hundred Six

Basics

Value: 91805 → 91806 → 91807

Parity: even

Prime: No

Previous Prime: 91801

Next Prime: 91807

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 11 × 13 × 107

Divisors: 1, 2, 3, 6, 11, 13, 22, 26, 33, 39

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110011010011110

Octal: 263236

Duodecimal: 45166

Hexadecimal: 1669e

Square: 8428341636

Square Root: 302.99504946450855

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

a(n) = C(n)*(C(n)-1)/2, where C(n) are the Catalan numbers (A000108). A51789

Triangular numbers whose sum of prime factors (with repetition) is also triangular. A76169

Triangular numbers all of whose digits are nonprimes. A111484

Triangular numbers which are products of five distinct primes. A357590

Given the infinite continued fraction i+(i/(i+(i/(i+...)))), where i is the square root of (-1), this is the numerator of the real part of the convergents. A91806