111009979 has 2 divisors, whose sum is σ = 111009980. Its totient is φ = 111009978.

The previous prime is 111009971. The next prime is 111010007. The reversal of 111009979 is 979900111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111009979 - 2³ = 111009971 is a prime.

It is not a weakly prime, because it can be changed into another prime (111009971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55504989 + 55504990.

It is an arithmetic number, because the mean of its divisors is an integer number (55504990).

Almost surely, 2^111009979 is an apocalyptic number.

111009979 is a deficient number, since it is larger than the sum of its proper divisors (1).

111009979 is an equidigital number, since it uses as much as digits as its factorization.

111009979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 37.

The square root of 111009979 is about 10536.1273245913. The cubic root of 111009979 is about 480.6039547502.

The spelling of 111009979 in words is "one hundred eleven million, nine thousand, nine hundred seventy-nine".