111668917 has 2 divisors, whose sum is σ = 111668918. Its totient is φ = 111668916.

The previous prime is 111668911. The next prime is 111668927. The reversal of 111668917 is 719866111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111640356 + 28561 = 10566^2 + 169^2 .

It is an emirp because it is prime and its reverse (719866111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111668917 - 2¹⁹ = 111144629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111668917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111668911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55834458 + 55834459.

It is an arithmetic number, because the mean of its divisors is an integer number (55834459).

Almost surely, 2^111668917 is an apocalyptic number.

It is an amenable number.

111668917 is a deficient number, since it is larger than the sum of its proper divisors (1).

111668917 is an equidigital number, since it uses as much as digits as its factorization.

111668917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 40.

The square root of 111668917 is about 10567.3514657174. The cubic root of 111668917 is about 481.5530095583.

The spelling of 111668917 in words is "one hundred eleven million, six hundred sixty-eight thousand, nine hundred seventeen".