199877213 has 2 divisors, whose sum is σ = 199877214. Its totient is φ = 199877212.

The previous prime is 199877149. The next prime is 199877231. The reversal of 199877213 is 312778991.

Together with next prime (199877231) 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., 197177764 + 2699449 = 14042^2 + 1643^2 .

It is a cyclic number.

It is not a de Polignac number, because 199877213 - 2⁶ = 199877149 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199877263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99938606 + 99938607.

It is an arithmetic number, because the mean of its divisors is an integer number (99938607).

Almost surely, 2^199877213 is an apocalyptic number.

It is an amenable number.

199877213 is a deficient number, since it is larger than the sum of its proper divisors (1).

199877213 is an equidigital number, since it uses as much as digits as its factorization.

199877213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 47.

The square root of 199877213 is about 14137.7937812093. The cubic root of 199877213 is about 584.6838460209.

The spelling of 199877213 in words is "one hundred ninety-nine million, eight hundred seventy-seven thousand, two hundred thirteen".