205868099 has 2 divisors, whose sum is σ = 205868100. Its totient is φ = 205868098.

The previous prime is 205868063. The next prime is 205868123. The reversal of 205868099 is 990868502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205868099 - 2¹⁶ = 205802563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (205868029) 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, 102934049 + 102934050.

It is an arithmetic number, because the mean of its divisors is an integer number (102934050).

Almost surely, 2^205868099 is an apocalyptic number.

205868099 is a deficient number, since it is larger than the sum of its proper divisors (1).

205868099 is an equidigital number, since it uses as much as digits as its factorization.

205868099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 205868099 is about 14348.1043695674. The cubic root of 205868099 is about 590.4679797554.

The spelling of 205868099 in words is "two hundred five million, eight hundred sixty-eight thousand, ninety-nine".