999439556 has 12 divisors (see below), whose sum is σ = 1759493568. Its totient is φ = 496727112.

The previous prime is 999439531. The next prime is 999439559. The reversal of 999439556 is 655934999.

999439556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 999439495 and 999439504.

It is not an unprimeable number, because it can be changed into a prime (999439559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 747416 + ... + 748751.

It is an arithmetic number, because the mean of its divisors is an integer number (146624464).

Almost surely, 2^999439556 is an apocalyptic number.

It is an amenable number.

999439556 is a deficient number, since it is larger than the sum of its proper divisors (760054012).

999439556 is a wasteful number, since it uses less digits than its factorization.

999439556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496338 (or 1496336 counting only the distinct ones).

The product of its digits is 11809800, while the sum is 59.

The square root of 999439556 is about 31613.9139620516. The cubic root of 999439556 is about 999.8131504227.

The spelling of 999439556 in words is "nine hundred ninety-nine million, four hundred thirty-nine thousand, five hundred fifty-six".