6604813 has 4 divisors (see below), whose sum is σ = 6765948. Its totient is φ = 6443680.

The previous prime is 6604811. The next prime is 6604817. The reversal of 6604813 is 3184066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 660969 + 5943844 = 813^2 + 2438^2 .

It is a cyclic number.

It is not a de Polignac number, because 6604813 - 2¹ = 6604811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6604811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80506 + ... + 80587.

It is an arithmetic number, because the mean of its divisors is an integer number (1691487).

Almost surely, 2^6604813 is an apocalyptic number.

It is an amenable number.

6604813 is a deficient number, since it is larger than the sum of its proper divisors (161135).

6604813 is a wasteful number, since it uses less digits than its factorization.

6604813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161134.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 6604813 is about 2569.9830738742. The cubic root of 6604813 is about 187.6233310075.

Adding to 6604813 its reverse (3184066), we get a palindrome (9788879).

The spelling of 6604813 in words is "six million, six hundred four thousand, eight hundred thirteen".