6689389 has 8 divisors (see below), whose sum is σ = 7977600. Its totient is φ = 5484336.

The previous prime is 6689383. The next prime is 6689399. The reversal of 6689389 is 9839866.

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

It is a cyclic number.

It is not a de Polignac number, because 6689389 - 2¹³ = 6681197 is a prime.

It is a Duffinian number.

6689389 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6689383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20614 + ... + 20935.

It is an arithmetic number, because the mean of its divisors is an integer number (997200).

Almost surely, 2^6689389 is an apocalyptic number.

It is an amenable number.

6689389 is a deficient number, since it is larger than the sum of its proper divisors (1288211).

6689389 is a wasteful number, since it uses less digits than its factorization.

6689389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41579.

The product of its digits is 559872, while the sum is 49.

The square root of 6689389 is about 2586.3853154548. The cubic root of 6689389 is about 188.4207886479.

The spelling of 6689389 in words is "six million, six hundred eighty-nine thousand, three hundred eighty-nine".