204234034309 has 2 divisors, whose sum is σ = 204234034310. Its totient is φ = 204234034308.

The previous prime is 204234034307. The next prime is 204234034343. The reversal of 204234034309 is 903430432402.

It is an a-pointer prime, because the next prime (204234034343) can be obtained adding 204234034309 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204233494084 + 540225 = 451922^2 + 735^2 .

It is a cyclic number.

It is not a de Polignac number, because 204234034309 - 2¹ = 204234034307 is a prime.

Together with 204234034307, 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 (204234034307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102117017154 + 102117017155.

It is an arithmetic number, because the mean of its divisors is an integer number (102117017155).

Almost surely, 2^204234034309 is an apocalyptic number.

It is an amenable number.

204234034309 is a deficient number, since it is larger than the sum of its proper divisors (1).

204234034309 is an equidigital number, since it uses as much as digits as its factorization.

204234034309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 34.

The spelling of 204234034309 in words is "two hundred four billion, two hundred thirty-four million, thirty-four thousand, three hundred nine".