111099979 has 2 divisors, whose sum is σ = 111099980. Its totient is φ = 111099978.

The previous prime is 111099953. The next prime is 111099983. The reversal of 111099979 is 979990111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111099979 - 2¹⁹ = 110575691 is a prime.

It is not a weakly prime, because it can be changed into another prime (111099949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55549989 + 55549990.

It is an arithmetic number, because the mean of its divisors is an integer number (55549990).

Almost surely, 2^111099979 is an apocalyptic number.

111099979 is a deficient number, since it is larger than the sum of its proper divisors (1).

111099979 is an equidigital number, since it uses as much as digits as its factorization.

111099979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45927, while the sum is 46.

The square root of 111099979 is about 10540.3974782738. The cubic root of 111099979 is about 480.7338009505.

The spelling of 111099979 in words is "one hundred eleven million, ninety-nine thousand, nine hundred seventy-nine".