206128199 has 2 divisors, whose sum is σ = 206128200. Its totient is φ = 206128198.

The previous prime is 206128193. The next prime is 206128253. The reversal of 206128199 is 991821602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206128199 - 2¹⁶ = 206062663 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206128193) 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, 103064099 + 103064100.

It is an arithmetic number, because the mean of its divisors is an integer number (103064100).

Almost surely, 2^206128199 is an apocalyptic number.

206128199 is a deficient number, since it is larger than the sum of its proper divisors (1).

206128199 is an equidigital number, since it uses as much as digits as its factorization.

206128199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 206128199 is about 14357.1654235786. The cubic root of 206128199 is about 590.7165468203.

The spelling of 206128199 in words is "two hundred six million, one hundred twenty-eight thousand, one hundred ninety-nine".