6809906 has 8 divisors (see below), whose sum is σ = 10250604. Its totient is φ = 3393040.

The previous prime is 6809903. The next prime is 6809921. The reversal of 6809906 is 6099086.

It can be written as a sum of positive squares in 2 ways, for example, as 6806881 + 3025 = 2609^2 + 55^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 6809906.

It is not an unprimeable number, because it can be changed into a prime (6809903) 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, 5225 + ... + 6396.

Almost surely, 2^6809906 is an apocalyptic number.

6809906 is a deficient number, since it is larger than the sum of its proper divisors (3440698).

6809906 is a wasteful number, since it uses less digits than its factorization.

6809906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11916.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 6809906 is about 2609.5796596387. The cubic root of 6809906 is about 189.5455992632.

The spelling of 6809906 in words is "six million, eight hundred nine thousand, nine hundred six".