111403979 has 2 divisors, whose sum is σ = 111403980. Its totient is φ = 111403978.

The previous prime is 111403969. The next prime is 111404021. The reversal of 111403979 is 979304111.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (979304111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111403979 is a prime.

It is not a weakly prime, because it can be changed into another prime (111403969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55701989 + 55701990.

It is an arithmetic number, because the mean of its divisors is an integer number (55701990).

Almost surely, 2^111403979 is an apocalyptic number.

111403979 is a deficient number, since it is larger than the sum of its proper divisors (1).

111403979 is an equidigital number, since it uses as much as digits as its factorization.

111403979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 111403979 is about 10554.8083355407. The cubic root of 111403979 is about 481.1718747864.

The spelling of 111403979 in words is "one hundred eleven million, four hundred three thousand, nine hundred seventy-nine".