111388243 has 4 divisors (see below), whose sum is σ = 111574800. Its totient is φ = 111201688.

The previous prime is 111388229. The next prime is 111388253. The reversal of 111388243 is 342883111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111388243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111388223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92380 + ... + 93577.

It is an arithmetic number, because the mean of its divisors is an integer number (27893700).

Almost surely, 2^111388243 is an apocalyptic number.

111388243 is a deficient number, since it is larger than the sum of its proper divisors (186557).

111388243 is an equidigital number, since it uses as much as digits as its factorization.

111388243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186556.

The product of its digits is 4608, while the sum is 31.

The square root of 111388243 is about 10554.0628669721. The cubic root of 111388243 is about 481.1492182732.

The spelling of 111388243 in words is "one hundred eleven million, three hundred eighty-eight thousand, two hundred forty-three".