199996697 has 2 divisors, whose sum is σ = 199996698. Its totient is φ = 199996696.

The previous prime is 199996681. The next prime is 199996711. The reversal of 199996697 is 796699991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183439936 + 16556761 = 13544^2 + 4069^2 .

It is an emirp because it is prime and its reverse (796699991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199996697 - 2⁴ = 199996681 is a prime.

It is not a weakly prime, because it can be changed into another prime (199996627) 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, 99998348 + 99998349.

It is an arithmetic number, because the mean of its divisors is an integer number (99998349).

Almost surely, 2^199996697 is an apocalyptic number.

It is an amenable number.

199996697 is a deficient number, since it is larger than the sum of its proper divisors (1).

199996697 is an equidigital number, since it uses as much as digits as its factorization.

199996697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14880348, while the sum is 65.

The square root of 199996697 is about 14142.0188445639. The cubic root of 199996697 is about 584.8003282813.

The spelling of 199996697 in words is "one hundred ninety-nine million, nine hundred ninety-six thousand, six hundred ninety-seven".