6809513 has 4 divisors (see below), whose sum is σ = 6902868. Its totient is φ = 6716160.

The previous prime is 6809507. The next prime is 6809527. The reversal of 6809513 is 3159086.

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 5721664 + 1087849 = 2392^2 + 1043^2 .

It is a cyclic number.

It is not a de Polignac number, because 6809513 - 2¹⁸ = 6547369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6809513.

It is not an unprimeable number, because it can be changed into a prime (6809533) 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, 46568 + ... + 46713.

It is an arithmetic number, because the mean of its divisors is an integer number (1725717).

Almost surely, 2^6809513 is an apocalyptic number.

It is an amenable number.

6809513 is a deficient number, since it is larger than the sum of its proper divisors (93355).

6809513 is an equidigital number, since it uses as much as digits as its factorization.

6809513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93354.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 6809513 is about 2609.5043590690. The cubic root of 6809513 is about 189.5419529646.

The spelling of 6809513 in words is "six million, eight hundred nine thousand, five hundred thirteen".