91319088 has 80 divisors (see below), whose sum is σ = 271339776. Its totient is φ = 25923840.

The previous prime is 91319077. The next prime is 91319089. The reversal of 91319088 is 88091319.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (91319089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57343 + ... + 58913.

Almost surely, 2^91319088 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 91319088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135669888).

91319088 is an abundant number, since it is smaller than the sum of its proper divisors (180020688).

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

91319088 is a wasteful number, since it uses less digits than its factorization.

91319088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762 (or 1756 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 91319088 is about 9556.1021342386. The cubic root of 91319088 is about 450.3192598621.

The spelling of 91319088 in words is "ninety-one million, three hundred nineteen thousand, eighty-eight".