91313 has 4 divisors (see below), whose sum is σ = 92160. Its totient is φ = 90468.

The previous prime is 91309. The next prime is 91331. The reversal of 91313 is 31319.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 91313 - 2² = 91309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91291 and 91300.

It is not an unprimeable number, because it can be changed into a prime (91303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233 + ... + 486.

It is an arithmetic number, because the mean of its divisors is an integer number (23040).

2⁹¹³¹³ is an apocalyptic number.

It is an amenable number.

91313 is a deficient number, since it is larger than the sum of its proper divisors (847).

91313 is a wasteful number, since it uses less digits than its factorization.

91313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846.

The product of its digits is 81, while the sum is 17.

The square root of 91313 is about 302.1804096893. The cubic root of 91313 is about 45.0309252445.

It can be divided in two parts, 91 and 313, that added together give a palindrome (404).

The spelling of 91313 in words is "ninety-one thousand, three hundred thirteen".