199991299 has 2 divisors, whose sum is σ = 199991300. Its totient is φ = 199991298.

The previous prime is 199991273. The next prime is 199991303. The reversal of 199991299 is 992199991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199991299 - 2⁷ = 199991171 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199991269) 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, 99995649 + 99995650.

It is an arithmetic number, because the mean of its divisors is an integer number (99995650).

Almost surely, 2^199991299 is an apocalyptic number.

199991299 is a deficient number, since it is larger than the sum of its proper divisors (1).

199991299 is an equidigital number, since it uses as much as digits as its factorization.

199991299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1062882, while the sum is 58.

The square root of 199991299 is about 14141.8279935799. The cubic root of 199991299 is about 584.7950668935.

The spelling of 199991299 in words is "one hundred ninety-nine million, nine hundred ninety-one thousand, two hundred ninety-nine".