91007004 has 72 divisors (see below), whose sum is σ = 235282320. Its totient is φ = 27357440.

The previous prime is 91006991. The next prime is 91007011. The reversal of 91007004 is 40070019.

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, 338182 + ... + 338450.

It is an arithmetic number, because the mean of its divisors is an integer number (3267810).

Almost surely, 2^91007004 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 91007004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117641160).

91007004 is an abundant number, since it is smaller than the sum of its proper divisors (144275316).

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

91007004 is a wasteful number, since it uses less digits than its factorization.

91007004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 91007004 is about 9539.7591164557. The cubic root of 91007004 is about 449.8056840051.

The spelling of 91007004 in words is "ninety-one million, seven thousand, four".