111718319 has 2 divisors, whose sum is σ = 111718320. Its totient is φ = 111718318.

The previous prime is 111718303. The next prime is 111718333. The reversal of 111718319 is 913817111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111718319 - 2⁴ = 111718303 is a prime.

It is a super-2 number, since 2×111718319² = 24961965600371522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111718219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55859159 + 55859160.

It is an arithmetic number, because the mean of its divisors is an integer number (55859160).

Almost surely, 2^111718319 is an apocalyptic number.

111718319 is a deficient number, since it is larger than the sum of its proper divisors (1).

111718319 is an equidigital number, since it uses as much as digits as its factorization.

111718319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 32.

The square root of 111718319 is about 10569.6886898338. The cubic root of 111718319 is about 481.6240116333.

The spelling of 111718319 in words is "one hundred eleven million, seven hundred eighteen thousand, three hundred nineteen".