204845449 has 2 divisors, whose sum is σ = 204845450. Its totient is φ = 204845448.

The previous prime is 204845413. The next prime is 204845527. The reversal of 204845449 is 944548402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146047225 + 58798224 = 12085^2 + 7668^2 .

It is a cyclic number.

It is not a de Polignac number, because 204845449 - 2¹³ = 204837257 is a prime.

It is not a weakly prime, because it can be changed into another prime (204845149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102422724 + 102422725.

It is an arithmetic number, because the mean of its divisors is an integer number (102422725).

Almost surely, 2^204845449 is an apocalyptic number.

It is an amenable number.

204845449 is a deficient number, since it is larger than the sum of its proper divisors (1).

204845449 is an equidigital number, since it uses as much as digits as its factorization.

204845449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 40.

The square root of 204845449 is about 14312.4228906220. The cubic root of 204845449 is about 589.4886395646.

The spelling of 204845449 in words is "two hundred four million, eight hundred forty-five thousand, four hundred forty-nine".