205902163 has 2 divisors, whose sum is σ = 205902164. Its totient is φ = 205902162.

The previous prime is 205902157. The next prime is 205902173. The reversal of 205902163 is 361209502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205902163 - 2⁵ = 205902131 is a prime.

It is not a weakly prime, because it can be changed into another prime (205902173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102951081 + 102951082.

It is an arithmetic number, because the mean of its divisors is an integer number (102951082).

Almost surely, 2^205902163 is an apocalyptic number.

205902163 is a deficient number, since it is larger than the sum of its proper divisors (1).

205902163 is an equidigital number, since it uses as much as digits as its factorization.

205902163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 205902163 is about 14349.2913762318. The cubic root of 205902163 is about 590.5005452542.

The spelling of 205902163 in words is "two hundred five million, nine hundred two thousand, one hundred sixty-three".