399118 has 4 divisors (see below), whose sum is σ = 598680. Its totient is φ = 199558.

The previous prime is 399107. The next prime is 399131. The reversal of 399118 is 811993.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 399118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99778 + ... + 99781.

It is an arithmetic number, because the mean of its divisors is an integer number (149670).

2³⁹⁹¹¹⁸ is an apocalyptic number.

399118 is a deficient number, since it is larger than the sum of its proper divisors (199562).

399118 is a wasteful number, since it uses less digits than its factorization.

399118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199561.

The product of its digits is 1944, while the sum is 31.

The square root of 399118 is about 631.7578650084. The cubic root of 399118 is about 73.6264348568.

The spelling of 399118 in words is "three hundred ninety-nine thousand, one hundred eighteen".