91012604 has 12 divisors (see below), whose sum is σ = 161454384. Its totient is φ = 44882784.

The previous prime is 91012601. The next prime is 91012619. The reversal of 91012604 is 40621019.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 91012604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91012601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155552 + ... + 156135.

It is an arithmetic number, because the mean of its divisors is an integer number (13454532).

Almost surely, 2^91012604 is an apocalyptic number.

It is an amenable number.

91012604 is a deficient number, since it is larger than the sum of its proper divisors (70441780).

91012604 is a wasteful number, since it uses less digits than its factorization.

91012604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311764 (or 311762 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 91012604 is about 9540.0526204000. The cubic root of 91012604 is about 449.8149098890.

The spelling of 91012604 in words is "ninety-one million, twelve thousand, six hundred four".