Properties of the Number 91091

Ninety-One Thousand Ninety-One

Basics

Value: 91090 → 91091 → 91092

Parity: odd

Prime: No

Previous Prime: 91081

Next Prime: 91097

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7 ² × 11 × 13 ²

Divisors: 1, 7, 11, 13, 49, 77, 91, 143, 169, 539

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10110001111010011

Octal: 261723

Duodecimal: 4486B

Hexadecimal: 163d3

Square: 8297570281

Square Root: 301.8128559223414

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

Stirling numbers of first kind, s(n+3, n), negated. A1303

Number of, not necessarily connected, regular simple graphs on n vertices with girth at least 5. A185315

Triangle read by rows: T(n,k) is the number of 2-stack sortable n-permutations with k runs. A82680

Legendre-binomial transform of 10ⁿ for p=3. A117611

Stirling numbers of first kind S1(14,n). A11524

Numbers k which are concatenations k = x//y such that x² - y² is a multiple of k. A162701

Number of double-crossing set partitions of {1,...,n}. A306558

Numbers needing in binary and ternary representation an equal minimal number of editing steps (delete, insert or substitute) to transform them into their square. A91091

Poincaré series [or Poincare series] of Lie algebra associated with a certain braid group. A7995