6623213 has 2 divisors, whose sum is σ = 6623214. Its totient is φ = 6623212.

The previous prime is 6623203. The next prime is 6623231. The reversal of 6623213 is 3123266.

Together with next prime (6623231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5697769 + 925444 = 2387^2 + 962^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6623213 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6623203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3311606 + 3311607.

It is an arithmetic number, because the mean of its divisors is an integer number (3311607).

Almost surely, 2^6623213 is an apocalyptic number.

It is an amenable number.

6623213 is a deficient number, since it is larger than the sum of its proper divisors (1).

6623213 is an equidigital number, since it uses as much as digits as its factorization.

6623213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 23.

The square root of 6623213 is about 2573.5603742675. The cubic root of 6623213 is about 187.7973994437.

Adding to 6623213 its reverse (3123266), we get a palindrome (9746479).

The spelling of 6623213 in words is "six million, six hundred twenty-three thousand, two hundred thirteen".