199996997 has 2 divisors, whose sum is σ = 199996998. Its totient is φ = 199996996.

The previous prime is 199996991. The next prime is 199997003. The reversal of 199996997 is 799699991.

It is a balanced prime because it is at equal distance from previous prime (199996991) and next prime (199997003).

It can be written as a sum of positive squares in only one way, i.e., 158407396 + 41589601 = 12586^2 + 6449^2 .

It is a cyclic number.

It is not a de Polignac number, because 199996997 - 2⁴ = 199996981 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199996991) 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, 99998498 + 99998499.

It is an arithmetic number, because the mean of its divisors is an integer number (99998499).

Almost surely, 2^199996997 is an apocalyptic number.

It is an amenable number.

199996997 is a deficient number, since it is larger than the sum of its proper divisors (1).

199996997 is an equidigital number, since it uses as much as digits as its factorization.

199996997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22320522, while the sum is 68.

The square root of 199996997 is about 14142.0294512492. The cubic root of 199996997 is about 584.8006206862.

The spelling of 199996997 in words is "one hundred ninety-nine million, nine hundred ninety-six thousand, nine hundred ninety-seven".