204969137 has 2 divisors, whose sum is σ = 204969138. Its totient is φ = 204969136.

The previous prime is 204969091. The next prime is 204969139. The reversal of 204969137 is 731969402.

204969137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137334961 + 67634176 = 11719^2 + 8224^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204969137 is a prime.

Together with 204969139, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 204969094 and 204969103.

It is not a weakly prime, because it can be changed into another prime (204969139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102484568 + 102484569.

It is an arithmetic number, because the mean of its divisors is an integer number (102484569).

Almost surely, 2^204969137 is an apocalyptic number.

It is an amenable number.

204969137 is a deficient number, since it is larger than the sum of its proper divisors (1).

204969137 is an equidigital number, since it uses as much as digits as its factorization.

204969137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 204969137 is about 14316.7432399970. The cubic root of 204969137 is about 589.6072623295.

The spelling of 204969137 in words is "two hundred four million, nine hundred sixty-nine thousand, one hundred thirty-seven".