111601859 has 2 divisors, whose sum is σ = 111601860. Its totient is φ = 111601858.

The previous prime is 111601837. The next prime is 111601901. The reversal of 111601859 is 958106111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111601859 - 2⁸ = 111601603 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (111601759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55800929 + 55800930.

It is an arithmetic number, because the mean of its divisors is an integer number (55800930).

Almost surely, 2^111601859 is an apocalyptic number.

111601859 is a deficient number, since it is larger than the sum of its proper divisors (1).

111601859 is an equidigital number, since it uses as much as digits as its factorization.

111601859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 32.

The square root of 111601859 is about 10564.1781033831. The cubic root of 111601859 is about 481.4565982244.

The spelling of 111601859 in words is "one hundred eleven million, six hundred one thousand, eight hundred fifty-nine".