991105712 has 40 divisors (see below), whose sum is σ = 2098829952. Its totient is φ = 451353600.

The previous prime is 991105693. The next prime is 991105727. The reversal of 991105712 is 217501199.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50339 + ... + 67202.

Almost surely, 2^991105712 is an apocalyptic number.

It is an amenable number.

991105712 is an abundant number, since it is smaller than the sum of its proper divisors (1107724240).

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

991105712 is a wasteful number, since it uses less digits than its factorization.

991105712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117597 (or 117591 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 35.

The square root of 991105712 is about 31481.8314587954. The cubic root of 991105712 is about 997.0264038236.

The spelling of 991105712 in words is "nine hundred ninety-one million, one hundred five thousand, seven hundred twelve".