199245239 has 2 divisors, whose sum is σ = 199245240. Its totient is φ = 199245238.

The previous prime is 199245131. The next prime is 199245257. The reversal of 199245239 is 932542991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199245239 - 2¹² = 199241143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199245239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199245289) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99622619 + 99622620.

It is an arithmetic number, because the mean of its divisors is an integer number (99622620).

Almost surely, 2^199245239 is an apocalyptic number.

199245239 is a deficient number, since it is larger than the sum of its proper divisors (1).

199245239 is an equidigital number, since it uses as much as digits as its factorization.

199245239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 44.

The square root of 199245239 is about 14115.4255692133. The cubic root of 199245239 is about 584.0669754534.

The spelling of 199245239 in words is "one hundred ninety-nine million, two hundred forty-five thousand, two hundred thirty-nine".