11689111 has 4 divisors (see below), whose sum is σ = 13358992. Its totient is φ = 10019232.

The previous prime is 11689109. The next prime is 11689127. The reversal of 11689111 is 11198611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11198611 = 29 ⋅386159.

It is a cyclic number.

It is not a de Polignac number, because 11689111 - 2¹ = 11689109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11689111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11689211) 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 in 3 ways as a sum of consecutive naturals, for example, 834930 + ... + 834943.

It is an arithmetic number, because the mean of its divisors is an integer number (3339748).

Almost surely, 2^11689111 is an apocalyptic number.

11689111 is a deficient number, since it is larger than the sum of its proper divisors (1669881).

11689111 is an equidigital number, since it uses as much as digits as its factorization.

11689111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669880.

The product of its digits is 432, while the sum is 28.

The square root of 11689111 is about 3418.9341906506. The cubic root of 11689111 is about 226.9484186137.

The spelling of 11689111 in words is "eleven million, six hundred eighty-nine thousand, one hundred eleven".