6816009 has 8 divisors (see below), whose sum is σ = 9106560. Its totient is φ = 4534736.

The previous prime is 6815971. The next prime is 6816011. The reversal of 6816009 is 9006186.

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 6816009 - 2¹² = 6811913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6816049) 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, 369 + ... + 3710.

It is an arithmetic number, because the mean of its divisors is an integer number (1138320).

Almost surely, 2^6816009 is an apocalyptic number.

It is an amenable number.

6816009 is a deficient number, since it is larger than the sum of its proper divisors (2290551).

6816009 is a wasteful number, since it uses less digits than its factorization.

6816009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4639.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 6816009 is about 2610.7487431769. The cubic root of 6816009 is about 189.6022055949.

The spelling of 6816009 in words is "six million, eight hundred sixteen thousand, nine".