204903903 has 4 divisors (see below), whose sum is σ = 273205208. Its totient is φ = 136602600.

The previous prime is 204903887. The next prime is 204903911. The reversal of 204903903 is 309309402.

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

It is not a de Polignac number, because 204903903 - 2⁴ = 204903887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204903943) 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 3 ways as a sum of consecutive naturals, for example, 34150648 + ... + 34150653.

It is an arithmetic number, because the mean of its divisors is an integer number (68301302).

Almost surely, 2^204903903 is an apocalyptic number.

204903903 is a deficient number, since it is larger than the sum of its proper divisors (68301305).

204903903 is an equidigital number, since it uses as much as digits as its factorization.

204903903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68301304.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 204903903 is about 14314.4648171002. The cubic root of 204903903 is about 589.5447057225.

The spelling of 204903903 in words is "two hundred four million, nine hundred three thousand, nine hundred three".