399676839 has 8 divisors (see below), whose sum is σ = 538890480. Its totient is φ = 263457216.

The previous prime is 399676829. The next prime is 399676841. The reversal of 399676839 is 938676993.

It is a happy number.

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

It is not a de Polignac number, because 399676839 - 2⁹ = 399676327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399676829) 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 in 7 ways as a sum of consecutive naturals, for example, 748192 + ... + 748725.

It is an arithmetic number, because the mean of its divisors is an integer number (67361310).

Almost surely, 2^399676839 is an apocalyptic number.

399676839 is a deficient number, since it is larger than the sum of its proper divisors (139213641).

399676839 is a wasteful number, since it uses less digits than its factorization.

399676839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497009.

The product of its digits is 13226976, while the sum is 60.

The square root of 399676839 is about 19991.9193425744. The cubic root of 399676839 is about 736.6078237182.

The spelling of 399676839 in words is "three hundred ninety-nine million, six hundred seventy-six thousand, eight hundred thirty-nine".