991112876 has 24 divisors (see below), whose sum is σ = 1907613120. Its totient is φ = 447702912.

The previous prime is 991112867. The next prime is 991112887. The reversal of 991112876 is 678211199.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 200321 + ... + 205208.

It is an arithmetic number, because the mean of its divisors is an integer number (79483880).

Almost surely, 2^991112876 is an apocalyptic number.

It is an amenable number.

991112876 is a deficient number, since it is larger than the sum of its proper divisors (916500244).

991112876 is a wasteful number, since it uses less digits than its factorization.

991112876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405593 (or 405591 counting only the distinct ones).

The product of its digits is 54432, while the sum is 44.

The square root of 991112876 is about 31481.9452385014. The cubic root of 991112876 is about 997.0288060833.

The spelling of 991112876 in words is "nine hundred ninety-one million, one hundred twelve thousand, eight hundred seventy-six".