Properties of the Number 91816

Ninety-One Thousand Eight Hundred Sixteen

Basics

Value: 91815 → 91816 → 91817

Parity: even

Prime: No

Previous Prime: 91813

Next Prime: 91823

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 23 × 499

Divisors: 1, 2, 4, 8, 23, 46, 92, 184, 499, 998

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10110011010101000

Octal: 263250

Duodecimal: 45174

Hexadecimal: 166a8

Square: 8430177856

Square Root: 303.0115509349437

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) = 9ⁿ + 8ⁿ - 1. A155663

Number of words of length 3n such that the index set of occurring letters is {1, 2, ..., k}, all letters are introduced in ascending order, and the words can be built by repeatedly inserting triples into the initially empty word. A321031

Numbers k such that 4^k - 5 is prime. A217348

Number of partitions of 4 copies of n into distinct parts. A258282

Sequence defined by the recurrence formula a(n+1)=sum(a(p)*a(n-p)+k,p=0..n)+l for n>=1, with here a(0)=1, a(1)=8, k=0 and l=-1. A177165

Numbers m such that the numerator of ∑_i=1..m (i+1)/i is prime. A91816

Number of (n+1)X(1+1) 0..7 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 14 and no adjacent elements equal. A234424