6816789 has 12 divisors (see below), whose sum is σ = 11253216. Its totient is φ = 3895272.

The previous prime is 6816787. The next prime is 6816829. The reversal of 6816789 is 9876186.

It is a happy number.

It is not a de Polignac number, because 6816789 - 2¹ = 6816787 is a prime.

It is a super-2 number, since 2×6816789² = 92937224541042, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6816787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54039 + ... + 54164.

It is an arithmetic number, because the mean of its divisors is an integer number (937768).

Almost surely, 2^6816789 is an apocalyptic number.

It is an amenable number.

6816789 is a deficient number, since it is larger than the sum of its proper divisors (4436427).

6816789 is a wasteful number, since it uses less digits than its factorization.

6816789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108216 (or 108213 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 6816789 is about 2610.8981213368. The cubic root of 6816789 is about 189.6094377880.

The spelling of 6816789 in words is "six million, eight hundred sixteen thousand, seven hundred eighty-nine".