91004504 has 8 divisors (see below), whose sum is σ = 170633460. Its totient is φ = 45502248.

The previous prime is 91004503. The next prime is 91004513. The reversal of 91004504 is 40540019.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 91004504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91004503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5687774 + ... + 5687789.

Almost surely, 2^91004504 is an apocalyptic number.

It is an amenable number.

91004504 is a deficient number, since it is larger than the sum of its proper divisors (79628956).

91004504 is a wasteful number, since it uses less digits than its factorization.

91004504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11375569 (or 11375565 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 91004504 is about 9539.6280849937. The cubic root of 91004504 is about 449.8015651847.

The spelling of 91004504 in words is "ninety-one million, four thousand, five hundred four".