111568997 has 2 divisors, whose sum is σ = 111568998. Its totient is φ = 111568996.

The previous prime is 111568973. The next prime is 111569041. The reversal of 111568997 is 799865111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56942116 + 54626881 = 7546^2 + 7391^2 .

It is an emirp because it is prime and its reverse (799865111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111568997 is a 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 (111568937) 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, 55784498 + 55784499.

It is an arithmetic number, because the mean of its divisors is an integer number (55784499).

Almost surely, 2^111568997 is an apocalyptic number.

It is an amenable number.

111568997 is a deficient number, since it is larger than the sum of its proper divisors (1).

111568997 is an equidigital number, since it uses as much as digits as its factorization.

111568997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 47.

The square root of 111568997 is about 10562.6226383413. The cubic root of 111568997 is about 481.4093374229.

The spelling of 111568997 in words is "one hundred eleven million, five hundred sixty-eight thousand, nine hundred ninety-seven".