991332112 has 40 divisors (see below), whose sum is σ = 1970811360. Its totient is φ = 482776320.

The previous prime is 991332109. The next prime is 991332127. The reversal of 991332112 is 211233199.

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, 667723 + ... + 669205.

It is an arithmetic number, because the mean of its divisors is an integer number (49270284).

Almost surely, 2^991332112 is an apocalyptic number.

It is an amenable number.

991332112 is a deficient number, since it is larger than the sum of its proper divisors (979479248).

991332112 is a wasteful number, since it uses less digits than its factorization.

991332112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551 (or 2545 counting only the distinct ones).

The product of its digits is 2916, while the sum is 31.

The square root of 991332112 is about 31485.4269782069. The cubic root of 991332112 is about 997.1023155349.

It can be divided in two parts, 9913 and 32112, that added together give a square (42025 = 205²).

The spelling of 991332112 in words is "nine hundred ninety-one million, three hundred thirty-two thousand, one hundred twelve".