999431108 has 12 divisors (see below), whose sum is σ = 1883543340. Its totient is φ = 461275872.

The previous prime is 999431053. The next prime is 999431117. The reversal of 999431108 is 801134999.

999431108 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 414855424 + 584575684 = 20368^2 + 24178^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9609863 + ... + 9609966.

It is an arithmetic number, because the mean of its divisors is an integer number (156961945).

Almost surely, 2^999431108 is an apocalyptic number.

It is an amenable number.

999431108 is a deficient number, since it is larger than the sum of its proper divisors (884112232).

999431108 is a wasteful number, since it uses less digits than its factorization.

999431108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19219846 (or 19219844 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 999431108 is about 31613.7803497146. The cubic root of 999431108 is about 999.8103333622.

The spelling of 999431108 in words is "nine hundred ninety-nine million, four hundred thirty-one thousand, one hundred eight".