5723619821 has 2 divisors, whose sum is σ = 5723619822. Its totient is φ = 5723619820.

The previous prime is 5723619809. The next prime is 5723619883. The reversal of 5723619821 is 1289163275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4347951721 + 1375668100 = 65939^2 + 37090^2 .

It is a cyclic number.

It is not a de Polignac number, because 5723619821 - 2¹⁸ = 5723357677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5723619521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2861809910 + 2861809911.

It is an arithmetic number, because the mean of its divisors is an integer number (2861809911).

Almost surely, 2^5723619821 is an apocalyptic number.

It is an amenable number.

5723619821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5723619821 is an equidigital number, since it uses as much as digits as its factorization.

5723619821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 5723619821 is about 75654.6087228002. The cubic root of 5723619821 is about 1788.7799829265.

The spelling of 5723619821 in words is "five billion, seven hundred twenty-three million, six hundred nineteen thousand, eight hundred twenty-one".