204536243 has 2 divisors, whose sum is σ = 204536244. Its totient is φ = 204536242.

The previous prime is 204536239. The next prime is 204536261. The reversal of 204536243 is 342635402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204536243 - 2² = 204536239 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (204536203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102268121 + 102268122.

It is an arithmetic number, because the mean of its divisors is an integer number (102268122).

Almost surely, 2^204536243 is an apocalyptic number.

204536243 is a deficient number, since it is larger than the sum of its proper divisors (1).

204536243 is an equidigital number, since it uses as much as digits as its factorization.

204536243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 204536243 is about 14301.6167967122. The cubic root of 204536243 is about 589.1918870395.

The spelling of 204536243 in words is "two hundred four million, five hundred thirty-six thousand, two hundred forty-three".