5621813 has 2 divisors, whose sum is σ = 5621814. Its totient is φ = 5621812.

The previous prime is 5621809. The next prime is 5621827. The reversal of 5621813 is 3181265.

5621813 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4418404 + 1203409 = 2102^2 + 1097^2 .

It is a cyclic number.

It is not a de Polignac number, because 5621813 - 2² = 5621809 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 (5621873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2810906 + 2810907.

It is an arithmetic number, because the mean of its divisors is an integer number (2810907).

Almost surely, 2^5621813 is an apocalyptic number.

It is an amenable number.

5621813 is a deficient number, since it is larger than the sum of its proper divisors (1).

5621813 is an equidigital number, since it uses as much as digits as its factorization.

5621813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 5621813 is about 2371.0362713379. The cubic root of 5621813 is about 177.8110712674.

The spelling of 5621813 in words is "five million, six hundred twenty-one thousand, eight hundred thirteen".