199884017 has 2 divisors, whose sum is σ = 199884018. Its totient is φ = 199884016.

The previous prime is 199883993. The next prime is 199884019. The reversal of 199884017 is 710488991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195888016 + 3996001 = 13996^2 + 1999^2 .

It is an emirp because it is prime and its reverse (710488991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199884017 - 2¹² = 199879921 is a prime.

Together with 199884019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199884019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99942008 + 99942009.

It is an arithmetic number, because the mean of its divisors is an integer number (99942009).

Almost surely, 2^199884017 is an apocalyptic number.

It is an amenable number.

199884017 is a deficient number, since it is larger than the sum of its proper divisors (1).

199884017 is an equidigital number, since it uses as much as digits as its factorization.

199884017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 199884017 is about 14138.0344107659. The cubic root of 199884017 is about 584.6904803335.

The spelling of 199884017 in words is "one hundred ninety-nine million, eight hundred eighty-four thousand, seventeen".