Properties of the Number 9191

Nine Thousand One Hundred Ninety-One

Basics

Value: 9190 → 9191 → 9192

Parity: odd

Prime: No

Previous Prime: 9187

Next Prime: 9199

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7 × 13 × 101

Divisors: 1, 7, 13, 91, 101, 707, 1313, 9191

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001111100111

Octal: 21747

Duodecimal: 539B

Hexadecimal: 23e7

Square: 84474481

Square Root: 95.86970324351692

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

Triangle of q-binomial coefficients for q=-10. A15123

Triangle built from partial sums of Catalan numbers multiplied by powers of nonpositive numbers. A112707

T(n,k) = number of arrays of the median of three adjacent elements of some length n+2 0..k array. A228740

Numbers not of the form a² + b³ + c⁴ + d⁵ for a,b,c,d >= 0. A111151

Products of 3 distinct non-Sophie Germain primes. A157347

Geometric mean of the digits = 3. In other words, the product of the digits is = 3^k where k is the number of digits. A61427

Numbers whose consecutive digits differ by 8. A48410

Number of compositions (ordered partitions) of n into octagonal numbers (A000567). A322800

Generalized centered polygonal numbers. A81282

An interleaved sequence of pyramidal and polygonal numbers. A81284