199802017 has 2 divisors, whose sum is σ = 199802018. Its totient is φ = 199802016.

The previous prime is 199801993. The next prime is 199802051. The reversal of 199802017 is 710208991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156650256 + 43151761 = 12516^2 + 6569^2 .

It is an emirp because it is prime and its reverse (710208991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199802017 - 2²⁷ = 65584289 is a prime.

It is not a weakly prime, because it can be changed into another prime (199802417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99901008 + 99901009.

It is an arithmetic number, because the mean of its divisors is an integer number (99901009).

Almost surely, 2^199802017 is an apocalyptic number.

It is an amenable number.

199802017 is a deficient number, since it is larger than the sum of its proper divisors (1).

199802017 is an equidigital number, since it uses as much as digits as its factorization.

199802017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 199802017 is about 14135.1341344891. The cubic root of 199802017 is about 584.6105153321.

The spelling of 199802017 in words is "one hundred ninety-nine million, eight hundred two thousand, seventeen".