399368033 has 2 divisors, whose sum is σ = 399368034. Its totient is φ = 399368032.

The previous prime is 399368027. The next prime is 399368111. The reversal of 399368033 is 330863993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 337714129 + 61653904 = 18377^2 + 7852^2 .

It is a cyclic number.

It is not a de Polignac number, because 399368033 - 2⁸ = 399367777 is a prime.

It is not a weakly prime, because it can be changed into another prime (399368023) 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, 199684016 + 199684017.

It is an arithmetic number, because the mean of its divisors is an integer number (199684017).

Almost surely, 2^399368033 is an apocalyptic number.

It is an amenable number.

399368033 is a deficient number, since it is larger than the sum of its proper divisors (1).

399368033 is an equidigital number, since it uses as much as digits as its factorization.

399368033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 44.

The square root of 399368033 is about 19984.1945797172. The cubic root of 399368033 is about 736.4180641405.

The spelling of 399368033 in words is "three hundred ninety-nine million, three hundred sixty-eight thousand, thirty-three".