199388017 has 2 divisors, whose sum is σ = 199388018. Its totient is φ = 199388016.

The previous prime is 199387987. The next prime is 199388023. The reversal of 199388017 is 710883991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187388721 + 11999296 = 13689^2 + 3464^2 .

It is a cyclic number.

It is not a de Polignac number, because 199388017 - 2⁷ = 199387889 is a prime.

It is not a weakly prime, because it can be changed into another prime (199388417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99694008 + 99694009.

It is an arithmetic number, because the mean of its divisors is an integer number (99694009).

Almost surely, 2^199388017 is an apocalyptic number.

It is an amenable number.

199388017 is a deficient number, since it is larger than the sum of its proper divisors (1).

199388017 is an equidigital number, since it uses as much as digits as its factorization.

199388017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 199388017 is about 14120.4821801523. The cubic root of 199388017 is about 584.2064551612.

The spelling of 199388017 in words is "one hundred ninety-nine million, three hundred eighty-eight thousand, seventeen".