111664247 has 2 divisors, whose sum is σ = 111664248. Its totient is φ = 111664246.

The previous prime is 111664229. The next prime is 111664271. The reversal of 111664247 is 742466111.

It is a weak prime.

It is an emirp because it is prime and its reverse (742466111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111664247 - 2¹⁴ = 111647863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111664207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55832123 + 55832124.

It is an arithmetic number, because the mean of its divisors is an integer number (55832124).

Almost surely, 2^111664247 is an apocalyptic number.

111664247 is a deficient number, since it is larger than the sum of its proper divisors (1).

111664247 is an equidigital number, since it uses as much as digits as its factorization.

111664247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 111664247 is about 10567.1304998093. The cubic root of 111664247 is about 481.5462966073.

The spelling of 111664247 in words is "one hundred eleven million, six hundred sixty-four thousand, two hundred forty-seven".