199697989796939 has 2 divisors, whose sum is σ = 199697989796940. Its totient is φ = 199697989796938.

The previous prime is 199697989796923. The next prime is 199697989796999. The reversal of 199697989796939 is 939697989796991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199697989796939 - 2⁴ = 199697989796923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199697989796939.

It is not a weakly prime, because it can be changed into another prime (199697989796999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99848994898469 + 99848994898470.

It is an arithmetic number, because the mean of its divisors is an integer number (99848994898470).

Almost surely, 2^{199697989796939} is an apocalyptic number.

199697989796939 is a deficient number, since it is larger than the sum of its proper divisors (1).

199697989796939 is an equidigital number, since it uses as much as digits as its factorization.

199697989796939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1822425980256, while the sum is 110.

The spelling of 199697989796939 in words is "one hundred ninety-nine trillion, six hundred ninety-seven billion, nine hundred eighty-nine million, seven hundred ninety-six thousand, nine hundred thirty-nine".