111679 has 4 divisors (see below), whose sum is σ = 115560. Its totient is φ = 107800.

The previous prime is 111667. The next prime is 111697. The reversal of 111679 is 976111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111679 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1897 + ... + 1954.

It is an arithmetic number, because the mean of its divisors is an integer number (28890).

2¹¹¹⁶⁷⁹ is an apocalyptic number.

111679 is a deficient number, since it is larger than the sum of its proper divisors (3881).

111679 is an equidigital number, since it uses as much as digits as its factorization.

111679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880.

The product of its digits is 378, while the sum is 25.

The square root of 111679 is about 334.1840810093. The cubic root of 111679 is about 48.1567502857.

The spelling of 111679 in words is "one hundred eleven thousand, six hundred seventy-nine".