6689094209 has 32 divisors (see below), whose sum is σ = 8375685120. Its totient is φ = 5215839552.

The previous prime is 6689094197. The next prime is 6689094211. The reversal of 6689094209 is 9024909866.

It is a de Polignac number, because none of the positive numbers 2^k-6689094209 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6689094239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 302132 + ... + 323514.

It is an arithmetic number, because the mean of its divisors is an integer number (261740160).

Almost surely, 2^6689094209 is an apocalyptic number.

It is an amenable number.

6689094209 is a deficient number, since it is larger than the sum of its proper divisors (1686590911).

6689094209 is a wasteful number, since it uses less digits than its factorization.

6689094209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21509.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The square root of 6689094209 is about 81786.8828663863. The cubic root of 6689094209 is about 1884.1802080324.

The spelling of 6689094209 in words is "six billion, six hundred eighty-nine million, ninety-four thousand, two hundred nine".