199882217 has 2 divisors, whose sum is σ = 199882218. Its totient is φ = 199882216.

The previous prime is 199882127. The next prime is 199882229. The reversal of 199882217 is 712288991.

Together with previous prime (199882127) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167857936 + 32024281 = 12956^2 + 5659^2 .

It is a cyclic number.

It is not a de Polignac number, because 199882217 - 2¹⁰ = 199881193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199882517) 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, 99941108 + 99941109.

It is an arithmetic number, because the mean of its divisors is an integer number (99941109).

Almost surely, 2^199882217 is an apocalyptic number.

It is an amenable number.

199882217 is a deficient number, since it is larger than the sum of its proper divisors (1).

199882217 is an equidigital number, since it uses as much as digits as its factorization.

199882217 is an odious number, because the sum of its binary digits is odd.

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

The square root of 199882217 is about 14137.9707525514. The cubic root of 199882217 is about 584.6887252390.

The spelling of 199882217 in words is "one hundred ninety-nine million, eight hundred eighty-two thousand, two hundred seventeen".