205056647 has 2 divisors, whose sum is σ = 205056648. Its totient is φ = 205056646.

The previous prime is 205056589. The next prime is 205056653. The reversal of 205056647 is 746650502.

205056647 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 is a cyclic number.

It is not a de Polignac number, because 205056647 - 2⁶ = 205056583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205056667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102528323 + 102528324.

It is an arithmetic number, because the mean of its divisors is an integer number (102528324).

Almost surely, 2^205056647 is an apocalyptic number.

205056647 is a deficient number, since it is larger than the sum of its proper divisors (1).

205056647 is an equidigital number, since it uses as much as digits as its factorization.

205056647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 205056647 is about 14319.7991256861. The cubic root of 205056647 is about 589.6911598227.

The spelling of 205056647 in words is "two hundred five million, fifty-six thousand, six hundred forty-seven".