111111443 has 2 divisors, whose sum is σ = 111111444. Its totient is φ = 111111442.

The previous prime is 111111433. The next prime is 111111467. The reversal of 111111443 is 344111111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111111443 - 2¹⁴ = 111095059 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (111111433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555721 + 55555722.

It is an arithmetic number, because the mean of its divisors is an integer number (55555722).

Almost surely, 2^111111443 is an apocalyptic number.

111111443 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111443 is an equidigital number, since it uses as much as digits as its factorization.

111111443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 17.

The square root of 111111443 is about 10540.9412767551. The cubic root of 111111443 is about 480.7503354353.

Adding to 111111443 its reverse (344111111), we get a palindrome (455222554).

The spelling of 111111443 in words is "one hundred eleven million, one hundred eleven thousand, four hundred forty-three".