199328917 has 2 divisors, whose sum is σ = 199328918. Its totient is φ = 199328916.

The previous prime is 199328911. The next prime is 199328989. The reversal of 199328917 is 719823991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186896241 + 12432676 = 13671^2 + 3526^2 .

It is an emirp because it is prime and its reverse (719823991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199328917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199328911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99664458 + 99664459.

It is an arithmetic number, because the mean of its divisors is an integer number (99664459).

Almost surely, 2^199328917 is an apocalyptic number.

It is an amenable number.

199328917 is a deficient number, since it is larger than the sum of its proper divisors (1).

199328917 is an equidigital number, since it uses as much as digits as its factorization.

199328917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 49.

The square root of 199328917 is about 14118.3893203155. The cubic root of 199328917 is about 584.1487285003.

The spelling of 199328917 in words is "one hundred ninety-nine million, three hundred twenty-eight thousand, nine hundred seventeen".