199697989796999 has 2 divisors, whose sum is σ = 199697989797000. Its totient is φ = 199697989796998.

The previous prime is 199697989796939. The next prime is 199697989797037. The reversal of 199697989796999 is 999697989796991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199697989796999 is a prime.

It is a super-3 number, since 3×199697989796999³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199697989796939) 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, 99848994898499 + 99848994898500.

It is an arithmetic number, because the mean of its divisors is an integer number (99848994898500).

Almost surely, 2^{199697989796999} is an apocalyptic number.

199697989796999 is a deficient number, since it is larger than the sum of its proper divisors (1).

199697989796999 is an equidigital number, since it uses as much as digits as its factorization.

199697989796999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5467277940768, while the sum is 116.

The spelling of 199697989796999 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 ninety-nine".