398297239 has 2 divisors, whose sum is σ = 398297240. Its totient is φ = 398297238.

The previous prime is 398297203. The next prime is 398297257. The reversal of 398297239 is 932792893.

It is a strong prime.

It is an emirp because it is prime and its reverse (932792893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398297239 - 2²¹ = 396200087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398291239) 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, 199148619 + 199148620.

It is an arithmetic number, because the mean of its divisors is an integer number (199148620).

Almost surely, 2^398297239 is an apocalyptic number.

398297239 is a deficient number, since it is larger than the sum of its proper divisors (1).

398297239 is an equidigital number, since it uses as much as digits as its factorization.

398297239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 52.

The square root of 398297239 is about 19957.3855752701. The cubic root of 398297239 is about 735.7593084800.

The spelling of 398297239 in words is "three hundred ninety-eight million, two hundred ninety-seven thousand, two hundred thirty-nine".