398438713 has 2 divisors, whose sum is σ = 398438714. Its totient is φ = 398438712.

The previous prime is 398438647. The next prime is 398438737. The reversal of 398438713 is 317834893.

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., 398082304 + 356409 = 19952^2 + 597^2 .

It is an emirp because it is prime and its reverse (317834893) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398438713 is a prime.

It is not a weakly prime, because it can be changed into another prime (398438773) 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, 199219356 + 199219357.

It is an arithmetic number, because the mean of its divisors is an integer number (199219357).

Almost surely, 2^398438713 is an apocalyptic number.

It is an amenable number.

398438713 is a deficient number, since it is larger than the sum of its proper divisors (1).

398438713 is an equidigital number, since it uses as much as digits as its factorization.

398438713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 398438713 is about 19960.9296627186. The cubic root of 398438713 is about 735.8464113439.

The spelling of 398438713 in words is "three hundred ninety-eight million, four hundred thirty-eight thousand, seven hundred thirteen".