111408779 has 2 divisors, whose sum is σ = 111408780. Its totient is φ = 111408778.

The previous prime is 111408763. The next prime is 111408821. The reversal of 111408779 is 977804111.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (977804111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111408779 - 2⁴ = 111408763 is a prime.

It is not a weakly prime, because it can be changed into another prime (111408719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55704389 + 55704390.

It is an arithmetic number, because the mean of its divisors is an integer number (55704390).

Almost surely, 2^111408779 is an apocalyptic number.

111408779 is a deficient number, since it is larger than the sum of its proper divisors (1).

111408779 is an equidigital number, since it uses as much as digits as its factorization.

111408779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 38.

The square root of 111408779 is about 10555.0357176089. The cubic root of 111408779 is about 481.1787853469.

The spelling of 111408779 in words is "one hundred eleven million, four hundred eight thousand, seven hundred seventy-nine".