111444427 has 4 divisors (see below), whose sum is σ = 111608280. Its totient is φ = 111280576.

The previous prime is 111444397. The next prime is 111444439. The reversal of 111444427 is 724444111.

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-111444427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111444395 and 111444404.

It is not an unprimeable number, because it can be changed into a prime (111444497) 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, 80902 + ... + 82267.

It is an arithmetic number, because the mean of its divisors is an integer number (27902070).

Almost surely, 2^111444427 is an apocalyptic number.

111444427 is a deficient number, since it is larger than the sum of its proper divisors (163853).

111444427 is an equidigital number, since it uses as much as digits as its factorization.

111444427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163852.

The product of its digits is 3584, while the sum is 28.

The square root of 111444427 is about 10556.7242551845. The cubic root of 111444427 is about 481.2301015666.

Adding to 111444427 its reverse (724444111), we get a palindrome (835888538).

The spelling of 111444427 in words is "one hundred eleven million, four hundred forty-four thousand, four hundred twenty-seven".