204699332809 has 2 divisors, whose sum is σ = 204699332810. Its totient is φ = 204699332808.

The previous prime is 204699332801. The next prime is 204699332833. The reversal of 204699332809 is 908233996402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156388611600 + 48310721209 = 395460^2 + 219797^2 .

It is a cyclic number.

It is not a de Polignac number, because 204699332809 - 2³ = 204699332801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204699332809.

It is not a weakly prime, because it can be changed into another prime (204699332801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102349666404 + 102349666405.

It is an arithmetic number, because the mean of its divisors is an integer number (102349666405).

Almost surely, 2^204699332809 is an apocalyptic number.

It is an amenable number.

204699332809 is a deficient number, since it is larger than the sum of its proper divisors (1).

204699332809 is an equidigital number, since it uses as much as digits as its factorization.

204699332809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5038848, while the sum is 55.

The spelling of 204699332809 in words is "two hundred four billion, six hundred ninety-nine million, three hundred thirty-two thousand, eight hundred nine".