199983799 has 2 divisors, whose sum is σ = 199983800. Its totient is φ = 199983798.

The previous prime is 199983757. The next prime is 199983829. The reversal of 199983799 is 997389991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199983799 - 2²³ = 191595191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199983799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199983709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99991899 + 99991900.

It is an arithmetic number, because the mean of its divisors is an integer number (99991900).

Almost surely, 2^199983799 is an apocalyptic number.

199983799 is a deficient number, since it is larger than the sum of its proper divisors (1).

199983799 is an equidigital number, since it uses as much as digits as its factorization.

199983799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9920232, while the sum is 64.

The square root of 199983799 is about 14141.5628202826. The cubic root of 199983799 is about 584.7877565457.

The spelling of 199983799 in words is "one hundred ninety-nine million, nine hundred eighty-three thousand, seven hundred ninety-nine".