111991796 has 12 divisors (see below), whose sum is σ = 223983648. Its totient is φ = 47996472.

The previous prime is 111991793. The next prime is 111991813. The reversal of 111991796 is 697199111.

111991796 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111991793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1999826 + ... + 1999881.

It is an arithmetic number, because the mean of its divisors is an integer number (18665304).

Almost surely, 2^111991796 is an apocalyptic number.

It is an amenable number.

111991796 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

111991796 is a wasteful number, since it uses less digits than its factorization.

111991796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3999718 (or 3999716 counting only the distinct ones).

The product of its digits is 30618, while the sum is 44.

The square root of 111991796 is about 10582.6176345931. The cubic root of 111991796 is about 482.0166830196.

The spelling of 111991796 in words is "one hundred eleven million, nine hundred ninety-one thousand, seven hundred ninety-six".