111608291 has 2 divisors, whose sum is σ = 111608292. Its totient is φ = 111608290.

The previous prime is 111608279. The next prime is 111608293. The reversal of 111608291 is 192806111.

It is a strong prime.

It is an emirp because it is prime and its reverse (192806111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111608291 - 2⁶ = 111608227 is a prime.

Together with 111608293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111608293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55804145 + 55804146.

It is an arithmetic number, because the mean of its divisors is an integer number (55804146).

Almost surely, 2^111608291 is an apocalyptic number.

111608291 is a deficient number, since it is larger than the sum of its proper divisors (1).

111608291 is an equidigital number, since it uses as much as digits as its factorization.

111608291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 29.

The square root of 111608291 is about 10564.4825240047. The cubic root of 111608291 is about 481.4658473814.

The spelling of 111608291 in words is "one hundred eleven million, six hundred eight thousand, two hundred ninety-one".