111391859 has 2 divisors, whose sum is σ = 111391860. Its totient is φ = 111391858.

The previous prime is 111391853. The next prime is 111391883. The reversal of 111391859 is 958193111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111391859 - 2²⁰ = 110343283 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (111391853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55695929 + 55695930.

It is an arithmetic number, because the mean of its divisors is an integer number (55695930).

Almost surely, 2^111391859 is an apocalyptic number.

111391859 is a deficient number, since it is larger than the sum of its proper divisors (1).

111391859 is an equidigital number, since it uses as much as digits as its factorization.

111391859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 38.

The square root of 111391859 is about 10554.2341740176. The cubic root of 111391859 is about 481.1544247375.

The spelling of 111391859 in words is "one hundred eleven million, three hundred ninety-one thousand, eight hundred fifty-nine".