6812209 has 4 divisors (see below), whose sum is σ = 7108416. Its totient is φ = 6516004.

The previous prime is 6812207. The next prime is 6812231. The reversal of 6812209 is 9022186.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9022186 = 2 ⋅4511093.

It is a cyclic number.

It is not a de Polignac number, because 6812209 - 2¹ = 6812207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6812207) 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, 148069 + ... + 148114.

It is an arithmetic number, because the mean of its divisors is an integer number (1777104).

Almost surely, 2^6812209 is an apocalyptic number.

It is an amenable number.

6812209 is a deficient number, since it is larger than the sum of its proper divisors (296207).

6812209 is a wasteful number, since it uses less digits than its factorization.

6812209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296206.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 6812209 is about 2610.0208811425. The cubic root of 6812209 is about 189.5669639397.

It can be divided in two parts, 6812 and 209, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 6812209 in words is "six million, eight hundred twelve thousand, two hundred nine".