91089196 has 48 divisors (see below), whose sum is σ = 188116992. Its totient is φ = 38124800.

The previous prime is 91089169. The next prime is 91089197. The reversal of 91089196 is 69198019.

It is not an unprimeable number, because it can be changed into a prime (91089197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33861 + ... + 36451.

It is an arithmetic number, because the mean of its divisors is an integer number (3919104).

Almost surely, 2^91089196 is an apocalyptic number.

It is an amenable number.

91089196 is an abundant number, since it is smaller than the sum of its proper divisors (97027796).

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

91089196 is a wasteful number, since it uses less digits than its factorization.

91089196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670 (or 2668 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 91089196 is about 9544.0660098304. The cubic root of 91089196 is about 449.9410556539.

The spelling of 91089196 in words is "ninety-one million, eighty-nine thousand, one hundred ninety-six".