111605159 has 2 divisors, whose sum is σ = 111605160. Its totient is φ = 111605158.

The previous prime is 111605147. The next prime is 111605171. The reversal of 111605159 is 951506111.

It is a balanced prime because it is at equal distance from previous prime (111605147) and next prime (111605171).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111605159 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111605189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55802579 + 55802580.

It is an arithmetic number, because the mean of its divisors is an integer number (55802580).

Almost surely, 2^111605159 is an apocalyptic number.

111605159 is a deficient number, since it is larger than the sum of its proper divisors (1).

111605159 is an equidigital number, since it uses as much as digits as its factorization.

111605159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 29.

The square root of 111605159 is about 10564.3342904321. The cubic root of 111605159 is about 481.4613436385.

The spelling of 111605159 in words is "one hundred eleven million, six hundred five thousand, one hundred fifty-nine".