111189941 has 2 divisors, whose sum is σ = 111189942. Its totient is φ = 111189940.

The previous prime is 111189931. The next prime is 111189943. The reversal of 111189941 is 149981111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69639025 + 41550916 = 8345^2 + 6446^2 .

It is a cyclic number.

It is not a de Polignac number, because 111189941 - 2¹⁸ = 110927797 is a prime.

Together with 111189943, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111189943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55594970 + 55594971.

It is an arithmetic number, because the mean of its divisors is an integer number (55594971).

Almost surely, 2^111189941 is an apocalyptic number.

It is an amenable number.

111189941 is a deficient number, since it is larger than the sum of its proper divisors (1).

111189941 is an equidigital number, since it uses as much as digits as its factorization.

111189941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 35.

The square root of 111189941 is about 10544.6641008616. The cubic root of 111189941 is about 480.8635222660.

The spelling of 111189941 in words is "one hundred eleven million, one hundred eighty-nine thousand, nine hundred forty-one".