91404164 has 6 divisors (see below), whose sum is σ = 159957294. Its totient is φ = 45702080.

The previous prime is 91404163. The next prime is 91404179. The reversal of 91404164 is 46140419.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 73273600 + 18130564 = 8560^2 + 4258^2 .

It is not an unprimeable number, because it can be changed into a prime (91404161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11425517 + ... + 11425524.

It is an arithmetic number, because the mean of its divisors is an integer number (26659549).

Almost surely, 2^91404164 is an apocalyptic number.

It is an amenable number.

91404164 is a deficient number, since it is larger than the sum of its proper divisors (68553130).

91404164 is a wasteful number, since it uses less digits than its factorization.

91404164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22851045 (or 22851043 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 91404164 is about 9560.5524944953. The cubic root of 91404164 is about 450.4590607549.

The spelling of 91404164 in words is "ninety-one million, four hundred four thousand, one hundred sixty-four".