91245118 has 16 divisors (see below), whose sum is σ = 140332176. Its totient is φ = 44478720.

The previous prime is 91245113. The next prime is 91245173. The reversal of 91245118 is 81154219.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 91245118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91245113) 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, 14638 + ... + 19918.

It is an arithmetic number, because the mean of its divisors is an integer number (8770761).

Almost surely, 2^91245118 is an apocalyptic number.

91245118 is a deficient number, since it is larger than the sum of its proper divisors (49087058).

91245118 is a wasteful number, since it uses less digits than its factorization.

91245118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5499.

The product of its digits is 2880, while the sum is 31.

The square root of 91245118 is about 9552.2310482944. The cubic root of 91245118 is about 450.1976382882.

The spelling of 91245118 in words is "ninety-one million, two hundred forty-five thousand, one hundred eighteen".