111541439 has 2 divisors, whose sum is σ = 111541440. Its totient is φ = 111541438.

The previous prime is 111541351. The next prime is 111541477. The reversal of 111541439 is 934145111.

It is a strong prime.

It is an emirp because it is prime and its reverse (934145111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111541439 is a prime.

It is a super-2 number, since 2×111541439² = 24882985228381442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111541499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55770719 + 55770720.

It is an arithmetic number, because the mean of its divisors is an integer number (55770720).

Almost surely, 2^111541439 is an apocalyptic number.

111541439 is a deficient number, since it is larger than the sum of its proper divisors (1).

111541439 is an equidigital number, since it uses as much as digits as its factorization.

111541439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 29.

The square root of 111541439 is about 10561.3180522130. The cubic root of 111541439 is about 481.3696974651.

The spelling of 111541439 in words is "one hundred eleven million, five hundred forty-one thousand, four hundred thirty-nine".