5621823 has 12 divisors (see below), whose sum is σ = 8141640. Its totient is φ = 3738096.

The previous prime is 5621813. The next prime is 5621827. The reversal of 5621823 is 3281265.

It is not a de Polignac number, because 5621823 - 2⁹ = 5621311 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5621827) 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 11 ways as a sum of consecutive naturals, for example, 5008 + ... + 6026.

It is an arithmetic number, because the mean of its divisors is an integer number (678470).

Almost surely, 2^5621823 is an apocalyptic number.

5621823 is a deficient number, since it is larger than the sum of its proper divisors (2519817).

5621823 is a wasteful number, since it uses less digits than its factorization.

5621823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638 (or 1635 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 5621823 is about 2371.0383801196. The cubic root of 5621823 is about 177.8111766966.

The spelling of 5621823 in words is "five million, six hundred twenty-one thousand, eight hundred twenty-three".