399445003 has 2 divisors, whose sum is σ = 399445004. Its totient is φ = 399445002.

The previous prime is 399444967. The next prime is 399445027. The reversal of 399445003 is 300544993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399445003 - 2²⁵ = 365890571 is a prime.

It is not a weakly prime, because it can be changed into another prime (399445603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199722501 + 199722502.

It is an arithmetic number, because the mean of its divisors is an integer number (199722502).

Almost surely, 2^399445003 is an apocalyptic number.

399445003 is a deficient number, since it is larger than the sum of its proper divisors (1).

399445003 is an equidigital number, since it uses as much as digits as its factorization.

399445003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 399445003 is about 19986.1202588196. The cubic root of 399445003 is about 736.4653709291.

Adding to 399445003 its reverse (300544993), we get a palindrome (699989996).

The spelling of 399445003 in words is "three hundred ninety-nine million, four hundred forty-five thousand, three".