6813217 has 8 divisors (see below), whose sum is σ = 7079400. Its totient is φ = 6551424.

The previous prime is 6813199. The next prime is 6813227. The reversal of 6813217 is 7123186.

It can be written as a sum of positive squares in 4 ways, for example, as 467856 + 6345361 = 684^2 + 2519^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6813217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6813227) 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 7 ways as a sum of consecutive naturals, for example, 2259 + ... + 4327.

It is an arithmetic number, because the mean of its divisors is an integer number (884925).

Almost surely, 2^6813217 is an apocalyptic number.

It is an amenable number.

6813217 is a deficient number, since it is larger than the sum of its proper divisors (266183).

6813217 is a wasteful number, since it uses less digits than its factorization.

6813217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195.

The product of its digits is 2016, while the sum is 28.

The square root of 6813217 is about 2610.2139759031. The cubic root of 6813217 is about 189.5763135293.

The spelling of 6813217 in words is "six million, eight hundred thirteen thousand, two hundred seventeen".