399600017 has 2 divisors, whose sum is σ = 399600018. Its totient is φ = 399600016.

The previous prime is 399600007. The next prime is 399600043. The reversal of 399600017 is 710006993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398760961 + 839056 = 19969^2 + 916^2 .

It is an emirp because it is prime and its reverse (710006993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 399600017 - 2¹⁰ = 399598993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399600017.

It is not a weakly prime, because it can be changed into another prime (399600007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199800008 + 199800009.

It is an arithmetic number, because the mean of its divisors is an integer number (199800009).

Almost surely, 2^399600017 is an apocalyptic number.

It is an amenable number.

399600017 is a deficient number, since it is larger than the sum of its proper divisors (1).

399600017 is an equidigital number, since it uses as much as digits as its factorization.

399600017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 399600017 is about 19989.9979239619. The cubic root of 399600017 is about 736.5606261603.

The spelling of 399600017 in words is "three hundred ninety-nine million, six hundred thousand, seventeen".