999999876 has 24 divisors (see below), whose sum is σ = 2334527104. Its totient is φ = 333162720.

The previous prime is 999999797. The next prime is 999999883. The reversal of 999999876 is 678999999.

It is a happy number.

999999876 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 999999798 and 999999807.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4341 + ... + 44931.

Almost surely, 2^999999876 is an apocalyptic number.

It is an amenable number.

999999876 is an abundant number, since it is smaller than the sum of its proper divisors (1334527228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999999876 is a wasteful number, since it uses less digits than its factorization.

999999876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42651 (or 42649 counting only the distinct ones).

The product of its digits is 178564176, while the sum is 75.

The square root of 999999876 is about 31622.7746410716. The cubic root of 999999876 is about 999.9999586667. Note that the first 4 decimals are identical.

The spelling of 999999876 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred seventy-six".