91313404 has 72 divisors (see below), whose sum is σ = 206599680. Its totient is φ = 34512192.

The previous prime is 91313359. The next prime is 91313441. The reversal of 91313404 is 40431319.

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 23 ways as a sum of consecutive naturals, for example, 108417 + ... + 109255.

It is an arithmetic number, because the mean of its divisors is an integer number (2869440).

Almost surely, 2^91313404 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 91313404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103299840).

91313404 is an abundant number, since it is smaller than the sum of its proper divisors (115286276).

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

91313404 is a wasteful number, since it uses less digits than its factorization.

91313404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899 (or 884 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 91313404 is about 9555.8047280174. The cubic root of 91313404 is about 450.3099165516.

The spelling of 91313404 in words is "ninety-one million, three hundred thirteen thousand, four hundred four".