91604747 has 4 divisors (see below), whose sum is σ = 98651280. Its totient is φ = 84558216.

The previous prime is 91604683. The next prime is 91604759. The reversal of 91604747 is 74740619.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91604747 - 2⁶ = 91604683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91604747.

It is not an unprimeable number, because it can be changed into a prime (91604767) 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, 3523247 + ... + 3523272.

It is an arithmetic number, because the mean of its divisors is an integer number (24662820).

Almost surely, 2^91604747 is an apocalyptic number.

91604747 is a deficient number, since it is larger than the sum of its proper divisors (7046533).

91604747 is a wasteful number, since it uses less digits than its factorization.

91604747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7046532.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 91604747 is about 9571.0368821774. The cubic root of 91604747 is about 450.7883251748.

The spelling of 91604747 in words is "ninety-one million, six hundred four thousand, seven hundred forty-seven".