399303 has 16 divisors (see below), whose sum is σ = 618240. Its totient is φ = 254232.

The previous prime is 399283. The next prime is 399353. The reversal of 399303 is 303993.

It is not a de Polignac number, because 399303 - 2⁵ = 399271 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

399303 is a Rhonda number in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300 + ... + 942.

It is an arithmetic number, because the mean of its divisors is an integer number (38640).

2³⁹⁹³⁰³ is an apocalyptic number.

399303 is a deficient number, since it is larger than the sum of its proper divisors (218937).

399303 is a wasteful number, since it uses less digits than its factorization.

399303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 27.

The square root of 399303 is about 631.9042649009. The cubic root of 399303 is about 73.6378089254.

The spelling of 399303 in words is "three hundred ninety-nine thousand, three hundred three".