204564623 has 8 divisors (see below), whose sum is σ = 208258560. Its totient is φ = 200878360.

The previous prime is 204564611. The next prime is 204564649. The reversal of 204564623 is 326465402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204564623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204564623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204564653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91586 + ... + 93792.

It is an arithmetic number, because the mean of its divisors is an integer number (26032320).

Almost surely, 2^204564623 is an apocalyptic number.

204564623 is a deficient number, since it is larger than the sum of its proper divisors (3693937).

204564623 is a wasteful number, since it uses less digits than its factorization.

204564623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3837.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 204564623 is about 14302.6089578091. The cubic root of 204564623 is about 589.2191364765.

The spelling of 204564623 in words is "two hundred four million, five hundred sixty-four thousand, six hundred twenty-three".