111659 has 2 divisors, whose sum is σ = 111660. Its totient is φ = 111658.

The previous prime is 111653. The next prime is 111667. The reversal of 111659 is 956111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111659 - 2¹² = 107563 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55829 + 55830.

It is an arithmetic number, because the mean of its divisors is an integer number (55830).

2¹¹¹⁶⁵⁹ is an apocalyptic number.

111659 is a deficient number, since it is larger than the sum of its proper divisors (1).

111659 is an equidigital number, since it uses as much as digits as its factorization.

111659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 23.

The square root of 111659 is about 334.1541560418. The cubic root of 111659 is about 48.1538754017.

The spelling of 111659 in words is "one hundred eleven thousand, six hundred fifty-nine".