111243994 has 4 divisors (see below), whose sum is σ = 166865994. Its totient is φ = 55621996.

The previous prime is 111243989. The next prime is 111244009. The reversal of 111243994 is 499342111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 499342111 = 157 ⋅3180523.

It can be written as a sum of positive squares in only one way, i.e., 82137969 + 29106025 = 9063^2 + 5395^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27810997 + ... + 27811000.

Almost surely, 2^111243994 is an apocalyptic number.

111243994 is a deficient number, since it is larger than the sum of its proper divisors (55622000).

111243994 is an equidigital number, since it uses as much as digits as its factorization.

111243994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55621999.

The product of its digits is 7776, while the sum is 34.

The square root of 111243994 is about 10547.2268393166. The cubic root of 111243994 is about 480.9414307081.

The spelling of 111243994 in words is "one hundred eleven million, two hundred forty-three thousand, nine hundred ninety-four".