5653821 has 4 divisors (see below), whose sum is σ = 7538432. Its totient is φ = 3769212.

The previous prime is 5653819. The next prime is 5653841. The reversal of 5653821 is 1283565.

5653821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5653821 - 2¹ = 5653819 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5653841) 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, 942301 + ... + 942306.

It is an arithmetic number, because the mean of its divisors is an integer number (1884608).

Almost surely, 2^5653821 is an apocalyptic number.

It is an amenable number.

5653821 is a deficient number, since it is larger than the sum of its proper divisors (1884611).

5653821 is a wasteful number, since it uses less digits than its factorization.

5653821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884610.

The product of its digits is 7200, while the sum is 30.

The square root of 5653821 is about 2377.7764823465. The cubic root of 5653821 is about 178.1478908101.

The spelling of 5653821 in words is "five million, six hundred fifty-three thousand, eight hundred twenty-one".