111779443 has 2 divisors, whose sum is σ = 111779444. Its totient is φ = 111779442.

The previous prime is 111779401. The next prime is 111779449. The reversal of 111779443 is 344977111.

It is a strong prime.

It is an emirp because it is prime and its reverse (344977111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111779443 - 2¹³ = 111771251 is a prime.

It is not a weakly prime, because it can be changed into another prime (111779449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55889721 + 55889722.

It is an arithmetic number, because the mean of its divisors is an integer number (55889722).

Almost surely, 2^111779443 is an apocalyptic number.

111779443 is a deficient number, since it is larger than the sum of its proper divisors (1).

111779443 is an equidigital number, since it uses as much as digits as its factorization.

111779443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 111779443 is about 10572.5797703304. The cubic root of 111779443 is about 481.7118319630.

The spelling of 111779443 in words is "one hundred eleven million, seven hundred seventy-nine thousand, four hundred forty-three".