11688689 has 4 divisors (see below), whose sum is σ = 11714724. Its totient is φ = 11662656.

The previous prime is 11688679. The next prime is 11688709. The reversal of 11688689 is 98688611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98688611 = 7 ⋅14098373.

It can be written as a sum of positive squares in 2 ways, for example, as 4840000 + 6848689 = 2200^2 + 2617^2 .

It is a cyclic number.

It is not a de Polignac number, because 11688689 - 2⁸ = 11688433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11688679) 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, 12332 + ... + 13245.

It is an arithmetic number, because the mean of its divisors is an integer number (2928681).

Almost surely, 2^11688689 is an apocalyptic number.

It is an amenable number.

11688689 is a deficient number, since it is larger than the sum of its proper divisors (26035).

11688689 is an equidigital number, since it uses as much as digits as its factorization.

11688689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26034.

The product of its digits is 165888, while the sum is 47.

The square root of 11688689 is about 3418.8724749543. The cubic root of 11688689 is about 226.9456874854.

The spelling of 11688689 in words is "eleven million, six hundred eighty-eight thousand, six hundred eighty-nine".