206318129 has 2 divisors, whose sum is σ = 206318130. Its totient is φ = 206318128.

The previous prime is 206318111. The next prime is 206318141. The reversal of 206318129 is 921813602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170041600 + 36276529 = 13040^2 + 6023^2 .

It is a cyclic number.

It is not a de Polignac number, because 206318129 - 2⁸ = 206317873 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 206318095 and 206318104.

It is not a weakly prime, because it can be changed into another prime (206318159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103159064 + 103159065.

It is an arithmetic number, because the mean of its divisors is an integer number (103159065).

Almost surely, 2^206318129 is an apocalyptic number.

It is an amenable number.

206318129 is a deficient number, since it is larger than the sum of its proper divisors (1).

206318129 is an equidigital number, since it uses as much as digits as its factorization.

206318129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 206318129 is about 14363.7783678251. The cubic root of 206318129 is about 590.8979231879.

The spelling of 206318129 in words is "two hundred six million, three hundred eighteen thousand, one hundred twenty-nine".