111642379 has 2 divisors, whose sum is σ = 111642380. Its totient is φ = 111642378.

The previous prime is 111642353. The next prime is 111642389. The reversal of 111642379 is 973246111.

It is a strong prime.

It is an emirp because it is prime and its reverse (973246111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111642379 is a prime.

It is not a weakly prime, because it can be changed into another prime (111642389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55821189 + 55821190.

It is an arithmetic number, because the mean of its divisors is an integer number (55821190).

Almost surely, 2^111642379 is an apocalyptic number.

111642379 is a deficient number, since it is larger than the sum of its proper divisors (1).

111642379 is an equidigital number, since it uses as much as digits as its factorization.

111642379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 111642379 is about 10566.0957311582. The cubic root of 111642379 is about 481.5148596816.

The spelling of 111642379 in words is "one hundred eleven million, six hundred forty-two thousand, three hundred seventy-nine".