56604309 has 16 divisors (see below), whose sum is σ = 77599488. Its totient is φ = 36683712.

The previous prime is 56604293. The next prime is 56604319. The reversal of 56604309 is 90340665.

It is a happy number.

It is not a de Polignac number, because 56604309 - 2⁴ = 56604293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56604309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56604319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20859 + ... + 23415.

It is an arithmetic number, because the mean of its divisors is an integer number (4849968).

Almost surely, 2^56604309 is an apocalyptic number.

It is an amenable number.

56604309 is a deficient number, since it is larger than the sum of its proper divisors (20995179).

56604309 is a wasteful number, since it uses less digits than its factorization.

56604309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 56604309 is about 7523.5835211686. The cubic root of 56604309 is about 383.9575080477.

The spelling of 56604309 in words is "fifty-six million, six hundred four thousand, three hundred nine".