111711689 has 2 divisors, whose sum is σ = 111711690. Its totient is φ = 111711688.

The previous prime is 111711661. The next prime is 111711701. The reversal of 111711689 is 986117111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69889600 + 41822089 = 8360^2 + 6467^2 .

It is a cyclic number.

It is not a de Polignac number, because 111711689 - 2¹⁶ = 111646153 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (111711619) 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, 55855844 + 55855845.

It is an arithmetic number, because the mean of its divisors is an integer number (55855845).

Almost surely, 2^111711689 is an apocalyptic number.

It is an amenable number.

111711689 is a deficient number, since it is larger than the sum of its proper divisors (1).

111711689 is an equidigital number, since it uses as much as digits as its factorization.

111711689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 35.

The square root of 111711689 is about 10569.3750524806. The cubic root of 111711689 is about 481.6144840095.

The spelling of 111711689 in words is "one hundred eleven million, seven hundred eleven thousand, six hundred eighty-nine".