111981834 has 12 divisors (see below), whose sum is σ = 242627346. Its totient is φ = 37327272.

The previous prime is 111981833. The next prime is 111981841. The reversal of 111981834 is 438189111.

It can be written as a sum of positive squares in only one way, i.e., 100100025 + 11881809 = 10005^2 + 3447^2 .

It is a super-2 number, since 2×111981834² = 25079862292007112, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111981833) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 3110589 + ... + 3110624.

Almost surely, 2^111981834 is an apocalyptic number.

111981834 is an abundant number, since it is smaller than the sum of its proper divisors (130645512).

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

111981834 is a wasteful number, since it uses less digits than its factorization.

111981834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6221221 (or 6221218 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 111981834 is about 10582.1469466267. The cubic root of 111981834 is about 482.0023903281.

The spelling of 111981834 in words is "one hundred eleven million, nine hundred eighty-one thousand, eight hundred thirty-four".