91275136 has 32 divisors (see below), whose sum is σ = 182284200. Its totient is φ = 45525504.

The previous prime is 91275133. The next prime is 91275137. The reversal of 91275136 is 63157219.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91275133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81750 + ... + 82858.

Almost surely, 2^91275136 is an apocalyptic number.

It is an amenable number.

91275136 is a deficient number, since it is larger than the sum of its proper divisors (91009064).

91275136 is a wasteful number, since it uses less digits than its factorization.

91275136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766 (or 1754 counting only the distinct ones).

The product of its digits is 11340, while the sum is 34.

The square root of 91275136 is about 9553.8021750505. The cubic root of 91275136 is about 450.2470018462.

The spelling of 91275136 in words is "ninety-one million, two hundred seventy-five thousand, one hundred thirty-six".