204475399 has 4 divisors (see below), whose sum is σ = 205253136. Its totient is φ = 203697664.

The previous prime is 204475379. The next prime is 204475417. The reversal of 204475399 is 993574402.

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 204475399 - 2⁵ = 204475367 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204475309) 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, 388474 + ... + 388999.

It is an arithmetic number, because the mean of its divisors is an integer number (51313284).

Almost surely, 2^204475399 is an apocalyptic number.

204475399 is a deficient number, since it is larger than the sum of its proper divisors (777737).

204475399 is an equidigital number, since it uses as much as digits as its factorization.

204475399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777736.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 204475399 is about 14299.4894664110. The cubic root of 204475399 is about 589.1334583621.

The spelling of 204475399 in words is "two hundred four million, four hundred seventy-five thousand, three hundred ninety-nine".