6689121 has 8 divisors (see below), whose sum is σ = 9388320. Its totient is φ = 4224672.

The previous prime is 6689117. The next prime is 6689131. The reversal of 6689121 is 1219866.

6689121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6689121 - 2² = 6689117 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

6689121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6689101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58620 + ... + 58733.

It is an arithmetic number, because the mean of its divisors is an integer number (1173540).

Almost surely, 2^6689121 is an apocalyptic number.

It is an amenable number.

6689121 is a deficient number, since it is larger than the sum of its proper divisors (2699199).

6689121 is a wasteful number, since it uses less digits than its factorization.

6689121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117375.

The product of its digits is 5184, while the sum is 33.

The square root of 6689121 is about 2586.3335051768. Note that the first 3 decimals coincide. The cubic root of 6689121 is about 188.4182723520.

The spelling of 6689121 in words is "six million, six hundred eighty-nine thousand, one hundred twenty-one".