399203603 has 2 divisors, whose sum is σ = 399203604. Its totient is φ = 399203602.

The previous prime is 399203599. The next prime is 399203641. The reversal of 399203603 is 306302993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399203603 - 2² = 399203599 is a prime.

It is not a weakly prime, because it can be changed into another prime (399203303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199601801 + 199601802.

It is an arithmetic number, because the mean of its divisors is an integer number (199601802).

Almost surely, 2^399203603 is an apocalyptic number.

399203603 is a deficient number, since it is larger than the sum of its proper divisors (1).

399203603 is an equidigital number, since it uses as much as digits as its factorization.

399203603 is an odious number, because the sum of its binary digits is odd.

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

The square root of 399203603 is about 19980.0801549944. The cubic root of 399203603 is about 736.3169829033.

The spelling of 399203603 in words is "three hundred ninety-nine million, two hundred three thousand, six hundred three".