204665413 has 2 divisors, whose sum is σ = 204665414. Its totient is φ = 204665412.

The previous prime is 204665411. The next prime is 204665437. The reversal of 204665413 is 314566402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192155044 + 12510369 = 13862^2 + 3537^2 .

It is a cyclic number.

It is not a de Polignac number, because 204665413 - 2¹ = 204665411 is a prime.

Together with 204665411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204665411) 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, 102332706 + 102332707.

It is an arithmetic number, because the mean of its divisors is an integer number (102332707).

Almost surely, 2^204665413 is an apocalyptic number.

It is an amenable number.

204665413 is a deficient number, since it is larger than the sum of its proper divisors (1).

204665413 is an equidigital number, since it uses as much as digits as its factorization.

204665413 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 31.

The square root of 204665413 is about 14306.1320069402. The cubic root of 204665413 is about 589.3158909806.

The spelling of 204665413 in words is "two hundred four million, six hundred sixty-five thousand, four hundred thirteen".