91199088 has 160 divisors (see below), whose sum is σ = 283315200. Its totient is φ = 27993600.

The previous prime is 91199083. The next prime is 91199089. The reversal of 91199088 is 88099119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91199083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 336393 + ... + 336663.

It is an arithmetic number, because the mean of its divisors is an integer number (1770720).

Almost surely, 2^91199088 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 91199088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141657600).

91199088 is an abundant number, since it is smaller than the sum of its proper divisors (192116112).

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

91199088 is a wasteful number, since it uses less digits than its factorization.

91199088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 91199088 is about 9549.8213595857. The cubic root of 91199088 is about 450.1219225190.

It can be divided in two parts, 911 and 99088, that added together give a palindrome (99999).

The spelling of 91199088 in words is "ninety-one million, one hundred ninety-nine thousand, eighty-eight".