91031104 has 56 divisors (see below), whose sum is σ = 188293248. Its totient is φ = 43630080.

The previous prime is 91031089. The next prime is 91031117. The reversal of 91031104 is 40113019.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159139 + ... + 159709.

Almost surely, 2^91031104 is an apocalyptic number.

91031104 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91031104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94146624).

91031104 is an abundant number, since it is smaller than the sum of its proper divisors (97262144).

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

91031104 is a wasteful number, since it uses less digits than its factorization.

91031104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 91031104 is about 9541.0221674619. The cubic root of 91031104 is about 449.8453855656.

The spelling of 91031104 in words is "ninety-one million, thirty-one thousand, one hundred four".