91088898 has 8 divisors (see below), whose sum is σ = 182177808. Its totient is φ = 30362964.

The previous prime is 91088891. The next prime is 91088903. The reversal of 91088898 is 89888019.

It is a sphenic number, since it is the product of 3 distinct primes.

91088898 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 91088898.

It is not an unprimeable number, because it can be changed into a prime (91088891) 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, 7590736 + ... + 7590747.

It is an arithmetic number, because the mean of its divisors is an integer number (22772226).

Almost surely, 2^91088898 is an apocalyptic number.

91088898 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

91088898 is a wasteful number, since it uses less digits than its factorization.

91088898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15181488.

The product of its (nonzero) digits is 331776, while the sum is 51.

The square root of 91088898 is about 9544.0503980228. The cubic root of 91088898 is about 449.9405649898.

The spelling of 91088898 in words is "ninety-one million, eighty-eight thousand, eight hundred ninety-eight".