111818117 has 2 divisors, whose sum is σ = 111818118. Its totient is φ = 111818116.

The previous prime is 111818099. The next prime is 111818131. The reversal of 111818117 is 711818111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92756161 + 19061956 = 9631^2 + 4366^2 .

It is a cyclic number.

It is not a de Polignac number, because 111818117 - 2⁶ = 111818053 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111818117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111818137) 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, 55909058 + 55909059.

It is an arithmetic number, because the mean of its divisors is an integer number (55909059).

Almost surely, 2^111818117 is an apocalyptic number.

It is an amenable number.

111818117 is a deficient number, since it is larger than the sum of its proper divisors (1).

111818117 is an equidigital number, since it uses as much as digits as its factorization.

111818117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 448, while the sum is 29.

The square root of 111818117 is about 10574.4085886635. The cubic root of 111818117 is about 481.7673805647.

The spelling of 111818117 in words is "one hundred eleven million, eight hundred eighteen thousand, one hundred seventeen".