399503 has 8 divisors (see below), whose sum is σ = 436800. Its totient is φ = 363168.

The previous prime is 399499. The next prime is 399523. The reversal of 399503 is 305993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 399503 - 2² = 399499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833 + ... + 1221.

It is an arithmetic number, because the mean of its divisors is an integer number (54600).

2³⁹⁹⁵⁰³ is an apocalyptic number.

399503 is a deficient number, since it is larger than the sum of its proper divisors (37297).

399503 is a wasteful number, since it uses less digits than its factorization.

399503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481.

The product of its (nonzero) digits is 3645, while the sum is 29.

The square root of 399503 is about 632.0624969099. The cubic root of 399503 is about 73.6501012644.

The spelling of 399503 in words is "three hundred ninety-nine thousand, five hundred three".