5723821 has 2 divisors, whose sum is σ = 5723822. Its totient is φ = 5723820.

The previous prime is 5723819. The next prime is 5723833. The reversal of 5723821 is 1283275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3515625 + 2208196 = 1875^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 5723821 - 2¹ = 5723819 is a prime.

Together with 5723819, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 5723821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5723891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2861910 + 2861911.

It is an arithmetic number, because the mean of its divisors is an integer number (2861911).

Almost surely, 2^5723821 is an apocalyptic number.

It is an amenable number.

5723821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5723821 is an equidigital number, since it uses as much as digits as its factorization.

5723821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 28.

The square root of 5723821 is about 2392.4508354405. The cubic root of 5723821 is about 178.8800940570.

The spelling of 5723821 in words is "five million, seven hundred twenty-three thousand, eight hundred twenty-one".