199613717 has 2 divisors, whose sum is σ = 199613718. Its totient is φ = 199613716.

The previous prime is 199613671. The next prime is 199613723. The reversal of 199613717 is 717316991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119224561 + 80389156 = 10919^2 + 8966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199613717 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 (199613737) 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, 99806858 + 99806859.

It is an arithmetic number, because the mean of its divisors is an integer number (99806859).

Almost surely, 2^199613717 is an apocalyptic number.

It is an amenable number.

199613717 is a deficient number, since it is larger than the sum of its proper divisors (1).

199613717 is an equidigital number, since it uses as much as digits as its factorization.

199613717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442, while the sum is 44.

The square root of 199613717 is about 14128.4718565031. The cubic root of 199613717 is about 584.4268055419.

The spelling of 199613717 in words is "one hundred ninety-nine million, six hundred thirteen thousand, seven hundred seventeen".