91099112 has 48 divisors (see below), whose sum is σ = 189383040. Its totient is φ = 41041728.

The previous prime is 91099097. The next prime is 91099123. The reversal of 91099112 is 21199019.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57353 + ... + 58919.

It is an arithmetic number, because the mean of its divisors is an integer number (3945480).

Almost surely, 2^91099112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91099112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94691520).

91099112 is an abundant number, since it is smaller than the sum of its proper divisors (98283928).

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

91099112 is a wasteful number, since it uses less digits than its factorization.

91099112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 91099112 is about 9544.5854807844. The cubic root of 91099112 is about 449.9573819721.

The spelling of 91099112 in words is "ninety-one million, ninety-nine thousand, one hundred twelve".