111999956 has 12 divisors (see below), whose sum is σ = 196330260. Its totient is φ = 55905600.

The previous prime is 111999913. The next prime is 111999977. The reversal of 111999956 is 659999111.

It can be written as a sum of positive squares in 2 ways, for example, as 46648900 + 65351056 = 6830^2 + 8084^2 .

It is a congruent number.

It is an unprimeable number.

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, 20891 + ... + 25698.

It is an arithmetic number, because the mean of its divisors is an integer number (16360855).

Almost surely, 2^111999956 is an apocalyptic number.

It is an amenable number.

111999956 is a deficient number, since it is larger than the sum of its proper divisors (84330304).

111999956 is a wasteful number, since it uses less digits than its factorization.

111999956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47194 (or 47192 counting only the distinct ones).

The product of its digits is 196830, while the sum is 50.

The square root of 111999956 is about 10583.0031654536. The cubic root of 111999956 is about 482.0283897123.

The spelling of 111999956 in words is "one hundred eleven million, nine hundred ninety-nine thousand, nine hundred fifty-six".