91398164 has 24 divisors (see below), whose sum is σ = 187910688. Its totient is φ = 38348640.

The previous prime is 91398157. The next prime is 91398253. The reversal of 91398164 is 46189319.

91398164 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

91398164 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79322 + ... + 80465.

It is an arithmetic number, because the mean of its divisors is an integer number (7829612).

Almost surely, 2^91398164 is an apocalyptic number.

It is an amenable number.

91398164 is an abundant number, since it is smaller than the sum of its proper divisors (96512524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91398164 is a wasteful number, since it uses less digits than its factorization.

91398164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159815 (or 159813 counting only the distinct ones).

The product of its digits is 46656, while the sum is 41.

The square root of 91398164 is about 9560.2386999489. The cubic root of 91398164 is about 450.4492041161.

The spelling of 91398164 in words is "ninety-one million, three hundred ninety-eight thousand, one hundred sixty-four".