111948979 has 2 divisors, whose sum is σ = 111948980. Its totient is φ = 111948978.

The previous prime is 111948959. The next prime is 111949001. The reversal of 111948979 is 979849111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111948979 - 2⁹ = 111948467 is a prime.

It is not a weakly prime, because it can be changed into another prime (111948929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55974489 + 55974490.

It is an arithmetic number, because the mean of its divisors is an integer number (55974490).

Almost surely, 2^111948979 is an apocalyptic number.

111948979 is a deficient number, since it is larger than the sum of its proper divisors (1).

111948979 is an equidigital number, since it uses as much as digits as its factorization.

111948979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 49.

The square root of 111948979 is about 10580.5944539993. The cubic root of 111948979 is about 481.9552465579.

The spelling of 111948979 in words is "one hundred eleven million, nine hundred forty-eight thousand, nine hundred seventy-nine".