91320445 has 16 divisors (see below), whose sum is σ = 112527360. Its totient is φ = 71121024.

The previous prime is 91320371. The next prime is 91320469. The reversal of 91320445 is 54402319.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91320445 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27252 + ... + 30418.

It is an arithmetic number, because the mean of its divisors is an integer number (7032960).

Almost surely, 2^91320445 is an apocalyptic number.

It is an amenable number.

91320445 is a deficient number, since it is larger than the sum of its proper divisors (21206915).

91320445 is a wasteful number, since it uses less digits than its factorization.

91320445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 91320445 is about 9556.1731357275. The cubic root of 91320445 is about 450.3214904297.

The spelling of 91320445 in words is "ninety-one million, three hundred twenty thousand, four hundred forty-five".