204953689 has 2 divisors, whose sum is σ = 204953690. Its totient is φ = 204953688.

The previous prime is 204953687. The next prime is 204953731. The reversal of 204953689 is 986359402.

204953689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176438089 + 28515600 = 13283^2 + 5340^2 .

It is a cyclic number.

It is not a de Polignac number, because 204953689 - 2¹ = 204953687 is a prime.

Together with 204953687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (204953687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102476844 + 102476845.

It is an arithmetic number, because the mean of its divisors is an integer number (102476845).

Almost surely, 2^204953689 is an apocalyptic number.

It is an amenable number.

204953689 is a deficient number, since it is larger than the sum of its proper divisors (1).

204953689 is an equidigital number, since it uses as much as digits as its factorization.

204953689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 204953689 is about 14316.2037216575. The cubic root of 204953689 is about 589.5924495599.

The spelling of 204953689 in words is "two hundred four million, nine hundred fifty-three thousand, six hundred eighty-nine".