199774213 has 2 divisors, whose sum is σ = 199774214. Its totient is φ = 199774212.

The previous prime is 199774187. The next prime is 199774217. The reversal of 199774213 is 312477991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196616484 + 3157729 = 14022^2 + 1777^2 .

It is a cyclic number.

It is not a de Polignac number, because 199774213 - 2⁹ = 199773701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199774213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199774217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99887106 + 99887107.

It is an arithmetic number, because the mean of its divisors is an integer number (99887107).

Almost surely, 2^199774213 is an apocalyptic number.

It is an amenable number.

199774213 is a deficient number, since it is larger than the sum of its proper divisors (1).

199774213 is an equidigital number, since it uses as much as digits as its factorization.

199774213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 43.

The square root of 199774213 is about 14134.1505935093. The cubic root of 199774213 is about 584.5833963786.

The spelling of 199774213 in words is "one hundred ninety-nine million, seven hundred seventy-four thousand, two hundred thirteen".