204004243 has 2 divisors, whose sum is σ = 204004244. Its totient is φ = 204004242.

The previous prime is 204004231. The next prime is 204004247. The reversal of 204004243 is 342400402.

204004243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204004243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204004243.

It is not a weakly prime, because it can be changed into another prime (204004247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102002121 + 102002122.

It is an arithmetic number, because the mean of its divisors is an integer number (102002122).

Almost surely, 2^204004243 is an apocalyptic number.

204004243 is a deficient number, since it is larger than the sum of its proper divisors (1).

204004243 is an equidigital number, since it uses as much as digits as its factorization.

204004243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 204004243 is about 14283.0053910233. The cubic root of 204004243 is about 588.6806129583.

Adding to 204004243 its reverse (342400402), we get a palindrome (546404645).

The spelling of 204004243 in words is "two hundred four million, four thousand, two hundred forty-three".