204005903 has 2 divisors, whose sum is σ = 204005904. Its totient is φ = 204005902.

The previous prime is 204005881. The next prime is 204005909. The reversal of 204005903 is 309500402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204005903 - 2¹⁶ = 203940367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204005909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102002951 + 102002952.

It is an arithmetic number, because the mean of its divisors is an integer number (102002952).

Almost surely, 2^204005903 is an apocalyptic number.

204005903 is a deficient number, since it is larger than the sum of its proper divisors (1).

204005903 is an equidigital number, since it uses as much as digits as its factorization.

204005903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 204005903 is about 14283.0635019242. The cubic root of 204005903 is about 588.6822096688.

The spelling of 204005903 in words is "two hundred four million, five thousand, nine hundred three".