204301609 has 2 divisors, whose sum is σ = 204301610. Its totient is φ = 204301608.

The previous prime is 204301567. The next prime is 204301619. The reversal of 204301609 is 906103402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201072400 + 3229209 = 14180^2 + 1797^2 .

It is a cyclic number.

It is not a de Polignac number, because 204301609 - 2⁷ = 204301481 is a prime.

It is not a weakly prime, because it can be changed into another prime (204301619) 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, 102150804 + 102150805.

It is an arithmetic number, because the mean of its divisors is an integer number (102150805).

Almost surely, 2^204301609 is an apocalyptic number.

It is an amenable number.

204301609 is a deficient number, since it is larger than the sum of its proper divisors (1).

204301609 is an equidigital number, since it uses as much as digits as its factorization.

204301609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 204301609 is about 14293.4113842707. The cubic root of 204301609 is about 588.9665034378.

The spelling of 204301609 in words is "two hundred four million, three hundred one thousand, six hundred nine".