91086108 has 12 divisors (see below), whose sum is σ = 212534280. Its totient is φ = 30362032.

The previous prime is 91086103. The next prime is 91086167. The reversal of 91086108 is 80168019.

91086108 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

91086108 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91086101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3795243 + ... + 3795266.

It is an arithmetic number, because the mean of its divisors is an integer number (17711190).

Almost surely, 2^91086108 is an apocalyptic number.

It is an amenable number.

91086108 is an abundant number, since it is smaller than the sum of its proper divisors (121448172).

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

91086108 is a wasteful number, since it uses less digits than its factorization.

91086108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7590516 (or 7590514 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 91086108 is about 9543.9042325455. The cubic root of 91086108 is about 449.9359711369.

The spelling of 91086108 in words is "ninety-one million, eighty-six thousand, one hundred eight".