6422809 has 4 divisors (see below), whose sum is σ = 6428800. Its totient is φ = 6416820.

The previous prime is 6422803. The next prime is 6422813. The reversal of 6422809 is 9082246.

6422809 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9082246 = 2 ⋅4541123.

It is a cyclic number.

It is not a de Polignac number, because 6422809 - 2⁵ = 6422777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6422803) 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 3 ways as a sum of consecutive naturals, for example, 897 + ... + 3694.

It is an arithmetic number, because the mean of its divisors is an integer number (1607200).

Almost surely, 2^6422809 is an apocalyptic number.

It is an amenable number.

6422809 is a deficient number, since it is larger than the sum of its proper divisors (5991).

6422809 is a wasteful number, since it uses less digits than its factorization.

6422809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5990.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 6422809 is about 2534.3261431789. The cubic root of 6422809 is about 185.8838543401.

The spelling of 6422809 in words is "six million, four hundred twenty-two thousand, eight hundred nine".