6689329 has 4 divisors (see below), whose sum is σ = 6764580. Its totient is φ = 6614080.

The previous prime is 6689327. The next prime is 6689339. The reversal of 6689329 is 9239866.

6689329 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1760929 + 4928400 = 1327^2 + 2220^2 .

It is a cyclic number.

It is not a de Polignac number, because 6689329 - 2¹ = 6689327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6689323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37492 + ... + 37669.

It is an arithmetic number, because the mean of its divisors is an integer number (1691145).

Almost surely, 2^6689329 is an apocalyptic number.

It is an amenable number.

6689329 is a deficient number, since it is larger than the sum of its proper divisors (75251).

6689329 is an equidigital number, since it uses as much as digits as its factorization.

6689329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75250.

The product of its digits is 139968, while the sum is 43.

The square root of 6689329 is about 2586.3737162290. The cubic root of 6689329 is about 188.4202253039.

The spelling of 6689329 in words is "six million, six hundred eighty-nine thousand, three hundred twenty-nine".