399623303 has 2 divisors, whose sum is σ = 399623304. Its totient is φ = 399623302.

The previous prime is 399623299. The next prime is 399623311. The reversal of 399623303 is 303326993.

It is a weak prime.

It is an emirp because it is prime and its reverse (303326993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 399623303 - 2² = 399623299 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399623603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199811651 + 199811652.

It is an arithmetic number, because the mean of its divisors is an integer number (199811652).

Almost surely, 2^399623303 is an apocalyptic number.

399623303 is a deficient number, since it is larger than the sum of its proper divisors (1).

399623303 is an equidigital number, since it uses as much as digits as its factorization.

399623303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 38.

The square root of 399623303 is about 19990.5803567580. The cubic root of 399623303 is about 736.5749331480.

The spelling of 399623303 in words is "three hundred ninety-nine million, six hundred twenty-three thousand, three hundred three".