91324913 has 4 divisors (see below), whose sum is σ = 91373040. Its totient is φ = 91276788.

The previous prime is 91324889. The next prime is 91324921. The reversal of 91324913 is 31942319.

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.

It is a cyclic number.

It is not a de Polignac number, because 91324913 - 2⁸ = 91324657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91324913.

It is not an unprimeable number, because it can be changed into a prime (91324993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21095 + ... + 25052.

It is an arithmetic number, because the mean of its divisors is an integer number (22843260).

Almost surely, 2^91324913 is an apocalyptic number.

It is an amenable number.

91324913 is a deficient number, since it is larger than the sum of its proper divisors (48127).

91324913 is a wasteful number, since it uses less digits than its factorization.

91324913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48126.

The product of its digits is 5832, while the sum is 32.

The square root of 91324913 is about 9556.4069084568. The cubic root of 91324913 is about 450.3288345449.

The spelling of 91324913 in words is "ninety-one million, three hundred twenty-four thousand, nine hundred thirteen".