999903404 has 6 divisors (see below), whose sum is σ = 1749830964. Its totient is φ = 499951700.

The previous prime is 999903391. The next prime is 999903473. The reversal of 999903404 is 404309999.

It is a happy number.

999903404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124987922 + ... + 124987929.

It is an arithmetic number, because the mean of its divisors is an integer number (291638494).

Almost surely, 2^999903404 is an apocalyptic number.

It is an amenable number.

999903404 is a deficient number, since it is larger than the sum of its proper divisors (749927560).

999903404 is a wasteful number, since it uses less digits than its factorization.

999903404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249975855 (or 249975853 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 999903404 is about 31621.2492479345. The cubic root of 999903404 is about 999.9678002965.

The spelling of 999903404 in words is "nine hundred ninety-nine million, nine hundred three thousand, four hundred four".