204386813 has 8 divisors (see below), whose sum is σ = 211224576. Its totient is φ = 197564400.

The previous prime is 204386789. The next prime is 204386821. The reversal of 204386813 is 318683402.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 204386813 - 2²⁶ = 137277949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204386213) 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 7 ways as a sum of consecutive naturals, for example, 27395 + ... + 34047.

It is an arithmetic number, because the mean of its divisors is an integer number (26403072).

Almost surely, 2^204386813 is an apocalyptic number.

It is an amenable number.

204386813 is a deficient number, since it is larger than the sum of its proper divisors (6837763).

204386813 is an equidigital number, since it uses as much as digits as its factorization.

204386813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7675.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 204386813 is about 14296.3916076750. The cubic root of 204386813 is about 589.0483682318.

The spelling of 204386813 in words is "two hundred four million, three hundred eighty-six thousand, eight hundred thirteen".