398968307 has 2 divisors, whose sum is σ = 398968308. Its totient is φ = 398968306.

The previous prime is 398968247. The next prime is 398968321. The reversal of 398968307 is 703869893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398968307 - 2²⁶ = 331859443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (398968387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199484153 + 199484154.

It is an arithmetic number, because the mean of its divisors is an integer number (199484154).

Almost surely, 2^398968307 is an apocalyptic number.

398968307 is a deficient number, since it is larger than the sum of its proper divisors (1).

398968307 is an equidigital number, since it uses as much as digits as its factorization.

398968307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 398968307 is about 19974.1910224169. The cubic root of 398968307 is about 736.1722894104.

The spelling of 398968307 in words is "three hundred ninety-eight million, nine hundred sixty-eight thousand, three hundred seven".