91200164 has 12 divisors (see below), whose sum is σ = 174109488. Its totient is φ = 41454600.

The previous prime is 91200127. The next prime is 91200167. The reversal of 91200164 is 46100219.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (91200167) 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, 1036322 + ... + 1036409.

It is an arithmetic number, because the mean of its divisors is an integer number (14509124).

Almost surely, 2^91200164 is an apocalyptic number.

It is an amenable number.

91200164 is a deficient number, since it is larger than the sum of its proper divisors (82909324).

91200164 is a wasteful number, since it uses less digits than its factorization.

91200164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072746 (or 2072744 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 91200164 is about 9549.8776955519. The cubic root of 91200164 is about 450.1236927461.

The spelling of 91200164 in words is "ninety-one million, two hundred thousand, one hundred sixty-four".