204453409 has 2 divisors, whose sum is σ = 204453410. Its totient is φ = 204453408.

The previous prime is 204453397. The next prime is 204453427. The reversal of 204453409 is 904354402.

It is a happy number.

204453409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149989009 + 54464400 = 12247^2 + 7380^2 .

It is a cyclic number.

It is not a de Polignac number, because 204453409 - 2⁵ = 204453377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204453209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102226704 + 102226705.

It is an arithmetic number, because the mean of its divisors is an integer number (102226705).

Almost surely, 2^204453409 is an apocalyptic number.

It is an amenable number.

204453409 is a deficient number, since it is larger than the sum of its proper divisors (1).

204453409 is an equidigital number, since it uses as much as digits as its factorization.

204453409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 204453409 is about 14298.7205371670. The cubic root of 204453409 is about 589.1123384471.

The spelling of 204453409 in words is "two hundred four million, four hundred fifty-three thousand, four hundred nine".