205130647 has 2 divisors, whose sum is σ = 205130648. Its totient is φ = 205130646.

The previous prime is 205130633. The next prime is 205130693. The reversal of 205130647 is 746031502.

205130647 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205130647 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205130747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102565323 + 102565324.

It is an arithmetic number, because the mean of its divisors is an integer number (102565324).

Almost surely, 2^205130647 is an apocalyptic number.

205130647 is a deficient number, since it is larger than the sum of its proper divisors (1).

205130647 is an equidigital number, since it uses as much as digits as its factorization.

205130647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 205130647 is about 14322.3827277447. The cubic root of 205130647 is about 589.7620863989.

The spelling of 205130647 in words is "two hundred five million, one hundred thirty thousand, six hundred forty-seven".