111244391 has 4 divisors (see below), whose sum is σ = 111953112. Its totient is φ = 110535672.

The previous prime is 111244387. The next prime is 111244409. The reversal of 111244391 is 193442111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111244391 - 2² = 111244387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111244391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111244351) 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, 354125 + ... + 354438.

It is an arithmetic number, because the mean of its divisors is an integer number (27988278).

Almost surely, 2^111244391 is an apocalyptic number.

111244391 is a deficient number, since it is larger than the sum of its proper divisors (708721).

111244391 is an equidigital number, since it uses as much as digits as its factorization.

111244391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708720.

The product of its digits is 864, while the sum is 26.

The square root of 111244391 is about 10547.2456594127. The cubic root of 111244391 is about 480.9420028245.

The spelling of 111244391 in words is "one hundred eleven million, two hundred forty-four thousand, three hundred ninety-one".