111839941 has 2 divisors, whose sum is σ = 111839942. Its totient is φ = 111839940.

The previous prime is 111839929. The next prime is 111839977. The reversal of 111839941 is 149938111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110859841 + 980100 = 10529^2 + 990^2 .

It is a cyclic number.

It is not a de Polignac number, because 111839941 - 2¹¹ = 111837893 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 111839941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111039941) 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, 55919970 + 55919971.

It is an arithmetic number, because the mean of its divisors is an integer number (55919971).

Almost surely, 2^111839941 is an apocalyptic number.

It is an amenable number.

111839941 is a deficient number, since it is larger than the sum of its proper divisors (1).

111839941 is an equidigital number, since it uses as much as digits as its factorization.

111839941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 37.

The square root of 111839941 is about 10575.4404636403. The cubic root of 111839941 is about 481.7987213636.

The spelling of 111839941 in words is "one hundred eleven million, eight hundred thirty-nine thousand, nine hundred forty-one".