204404322137 has 2 divisors, whose sum is σ = 204404322138. Its totient is φ = 204404322136.

The previous prime is 204404322113. The next prime is 204404322139. The reversal of 204404322137 is 731223404402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145207485721 + 59196836416 = 381061^2 + 243304^2 .

It is a cyclic number.

It is not a de Polignac number, because 204404322137 - 2¹⁰ = 204404321113 is a prime.

It is a super-2 number, since 2×204404322137² (a number of 23 digits) contains 22 as substring.

Together with 204404322139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204404322139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102202161068 + 102202161069.

It is an arithmetic number, because the mean of its divisors is an integer number (102202161069).

Almost surely, 2^204404322137 is an apocalyptic number.

It is an amenable number.

204404322137 is a deficient number, since it is larger than the sum of its proper divisors (1).

204404322137 is an equidigital number, since it uses as much as digits as its factorization.

204404322137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 32.

Adding to 204404322137 its reverse (731223404402), we get a palindrome (935627726539).

The spelling of 204404322137 in words is "two hundred four billion, four hundred four million, three hundred twenty-two thousand, one hundred thirty-seven".