399890203 has 2 divisors, whose sum is σ = 399890204. Its totient is φ = 399890202.

The previous prime is 399890177. The next prime is 399890263. The reversal of 399890203 is 302098993.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399890203 - 2⁵ = 399890171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399890203.

It is not a weakly prime, because it can be changed into another prime (399890263) 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, 199945101 + 199945102.

It is an arithmetic number, because the mean of its divisors is an integer number (199945102).

Almost surely, 2^399890203 is an apocalyptic number.

399890203 is a deficient number, since it is larger than the sum of its proper divisors (1).

399890203 is an equidigital number, since it uses as much as digits as its factorization.

399890203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 399890203 is about 19997.2548866088. The cubic root of 399890203 is about 736.7388776243.

The spelling of 399890203 in words is "three hundred ninety-nine million, eight hundred ninety thousand, two hundred three".