399320063 has 2 divisors, whose sum is σ = 399320064. Its totient is φ = 399320062.

The previous prime is 399320039. The next prime is 399320081. The reversal of 399320063 is 360023993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399320063 - 2¹⁴ = 399303679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399320003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199660031 + 199660032.

It is an arithmetic number, because the mean of its divisors is an integer number (199660032).

Almost surely, 2^399320063 is an apocalyptic number.

399320063 is a deficient number, since it is larger than the sum of its proper divisors (1).

399320063 is an equidigital number, since it uses as much as digits as its factorization.

399320063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 35.

The square root of 399320063 is about 19982.9943451926. The cubic root of 399320063 is about 736.3885780641.

The spelling of 399320063 in words is "three hundred ninety-nine million, three hundred twenty thousand, sixty-three".