111867841 has 2 divisors, whose sum is σ = 111867842. Its totient is φ = 111867840.

The previous prime is 111867827. The next prime is 111867881. The reversal of 111867841 is 148768111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93412225 + 18455616 = 9665^2 + 4296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111867841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111867841.

It is not a weakly prime, because it can be changed into another prime (111867881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55933920 + 55933921.

It is an arithmetic number, because the mean of its divisors is an integer number (55933921).

Almost surely, 2^111867841 is an apocalyptic number.

It is an amenable number.

111867841 is a deficient number, since it is larger than the sum of its proper divisors (1).

111867841 is an equidigital number, since it uses as much as digits as its factorization.

111867841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 37.

The square root of 111867841 is about 10576.7594753781. The cubic root of 111867841 is about 481.8387817886.

The spelling of 111867841 in words is "one hundred eleven million, eight hundred sixty-seven thousand, eight hundred forty-one".