Properties of the Number 13391

Thirteen Thousand Three Hundred Ninety-One

Basics

Value: 13390 → 13391 → 13392

Parity: odd

Prime: No

Previous Prime: 13381

Next Prime: 13397

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 7 × 1913

Divisors: 1, 7, 1913, 13391

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11010001001111

Octal: 32117

Duodecimal: 78BB

Hexadecimal: 344f

Square: 179318881

Square Root: 115.71948841919411

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

Expansion of 1/(1 - x - x² + x⁴ - x⁶). A117791

Position of first appearance of n in the sequence of first differences of squarefree numbers, or the sequence ends if there is none. A376311

Triangle Q, read by rows, such that Q³ transforms column k of Q² into column k+1 of Q², so that column k of Q² equals column 0 of Q^3·k+2, where Q³ denotes the matrix cube of Q. A113381

Triangle, read by rows, given by the product R³*Q^-2 using triangular matrices Q=A113381, R=A113389. A114154

Triangle, read by rows, given by the product Q^-2·P³ using triangular matrices P=A113370, Q=A113381. A114155

Sorted positions of first appearances in the second differences of consecutive squarefree numbers (A005117). A376655

Row sums of triangle K(m, n), inverse to triangle T(m,n) in A020921. A38200

Starting index of a string of exactly 4 consecutive equal digits in decimal expansion of π. A49520

Starting index of a string of 4 or more consecutive equal digits in decimal expansion of π. A49516

The Riordan square of the Bell numbers. Triangle T(n, k), 0 <= k <= n, read by rows. A154380