Properties of the Number 9091

Nine Thousand Ninety-One

Basics

Value: 9090 → 9091 → 9092

Parity: odd

Prime: Yes

Previous Prime: 9067

Next Prime: 9103

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 9091

Divisors: 1, 9091

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10001110000011

Octal: 21603

Duodecimal: 5317

Hexadecimal: 2383

Square: 82646281

Square Root: 95.34673565466203

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

Primes formed by concatenating n with n+1. A30458

Primes from merging of 4 successive digits in decimal expansion of π. A104824

Primes having only {0, 1, 9} as digits. A199329

Smallest primitive factor of 10ⁿ - 1. Also smallest prime p such that 1/p has repeating decimal expansion of period n. A7138

Largest prime factor of the "repunit" number 11...1 (cf. A002275). A3020

Primes with first digit 9. A45715

Smallest prime of the form (n^k+1)/(n+1), or 0 if no such prime exists. A84741

Prime 3 followed by unique period primes (the period r of 1/p is not shared with any other prime) of the form A019328(r)/gcd(A019328(r),r) in order (periods r are given in A051627). A40017

a(n) = n⁴ - n³ + n² - n + 1. A60884

Triangle of prime numbers in which n-th row lists all primes p such that 1/p has decimal period n, n >= 1. A46107