111866159 has 2 divisors, whose sum is σ = 111866160. Its totient is φ = 111866158.

The previous prime is 111866143. The next prime is 111866191. The reversal of 111866159 is 951668111.

It is a weak prime.

It is an emirp because it is prime and its reverse (951668111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111866159 - 2⁴ = 111866143 is a prime.

It is a Sophie Germain 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 (111866959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55933079 + 55933080.

It is an arithmetic number, because the mean of its divisors is an integer number (55933080).

Almost surely, 2^111866159 is an apocalyptic number.

111866159 is a deficient number, since it is larger than the sum of its proper divisors (1).

111866159 is an equidigital number, since it uses as much as digits as its factorization.

111866159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 38.

The square root of 111866159 is about 10576.6799611220. The cubic root of 111866159 is about 481.8363668649.

The spelling of 111866159 in words is "one hundred eleven million, eight hundred sixty-six thousand, one hundred fifty-nine".