91165122 has 16 divisors (see below), whose sum is σ = 202589280. Its totient is φ = 30388356.

The previous prime is 91165121. The next prime is 91165153. The reversal of 91165122 is 22156119.

91165122 is a `hidden beast` number, since 9 + 1 + 1 + 651 + 2 + 2 = 666.

It is a super-2 number, since 2×91165122² = 16622158938549768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (91165121) 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 7 ways as a sum of consecutive naturals, for example, 844068 + ... + 844175.

It is an arithmetic number, because the mean of its divisors is an integer number (12661830).

Almost surely, 2^91165122 is an apocalyptic number.

91165122 is an abundant number, since it is smaller than the sum of its proper divisors (111424158).

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

91165122 is a wasteful number, since it uses less digits than its factorization.

91165122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688254 (or 1688248 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 91165122 is about 9548.0428361000. The cubic root of 91165122 is about 450.0660347538.

The spelling of 91165122 in words is "ninety-one million, one hundred sixty-five thousand, one hundred twenty-two".