91099160 has 48 divisors (see below), whose sum is σ = 209630160. Its totient is φ = 35629760.

The previous prime is 91099157. The next prime is 91099181. The reversal of 91099160 is 6199019.

It is a self number, because there is not a number n which added to its sum of digits gives 91099160.

It is a congruent number.

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, 87845 + ... + 88875.

It is an arithmetic number, because the mean of its divisors is an integer number (4367295).

Almost surely, 2^91099160 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 91099160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104815080).

91099160 is an abundant number, since it is smaller than the sum of its proper divisors (118531000).

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

91099160 is a wasteful number, since it uses less digits than its factorization.

91099160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 1085 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 91099160 is about 9544.5879952987. The cubic root of 91099160 is about 449.9574609994.

The spelling of 91099160 in words is "ninety-one million, ninety-nine thousand, one hundred sixty".