111444439 has 2 divisors, whose sum is σ = 111444440. Its totient is φ = 111444438.

The previous prime is 111444397. The next prime is 111444449. The reversal of 111444439 is 934444111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111444439 - 2¹⁹ = 110920151 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111444439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111444449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55722219 + 55722220.

It is an arithmetic number, because the mean of its divisors is an integer number (55722220).

Almost surely, 2^111444439 is an apocalyptic number.

111444439 is a deficient number, since it is larger than the sum of its proper divisors (1).

111444439 is an equidigital number, since it uses as much as digits as its factorization.

111444439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 111444439 is about 10556.7248235426. The cubic root of 111444439 is about 481.2301188391.

The spelling of 111444439 in words is "one hundred eleven million, four hundred forty-four thousand, four hundred thirty-nine".