91264090 has 16 divisors (see below), whose sum is σ = 164570472. Its totient is φ = 36440064.

The previous prime is 91264081. The next prime is 91264097. The reversal of 91264090 is 9046219.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 90117049 + 1147041 = 9493^2 + 1071^2 .

It is not an unprimeable number, because it can be changed into a prime (91264097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2139 + ... + 13678.

Almost surely, 2^91264090 is an apocalyptic number.

91264090 is a deficient number, since it is larger than the sum of its proper divisors (73306382).

91264090 is a wasteful number, since it uses less digits than its factorization.

91264090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16401.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 91264090 is about 9553.2240631108. The cubic root of 91264090 is about 450.2288383417.

The spelling of 91264090 in words is "ninety-one million, two hundred sixty-four thousand, ninety".