204690652813 has 2 divisors, whose sum is σ = 204690652814. Its totient is φ = 204690652812.

The previous prime is 204690652763. The next prime is 204690652819. The reversal of 204690652813 is 318256096402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189783952164 + 14906700649 = 435642^2 + 122093^2 .

It is a cyclic number.

It is not a de Polignac number, because 204690652813 - 2¹³ = 204690644621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204690652819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102345326406 + 102345326407.

It is an arithmetic number, because the mean of its divisors is an integer number (102345326407).

Almost surely, 2^204690652813 is an apocalyptic number.

It is an amenable number.

204690652813 is a deficient number, since it is larger than the sum of its proper divisors (1).

204690652813 is an equidigital number, since it uses as much as digits as its factorization.

204690652813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 204690652813 in words is "two hundred four billion, six hundred ninety million, six hundred fifty-two thousand, eight hundred thirteen".