5688736721 has 2 divisors, whose sum is σ = 5688736722. Its totient is φ = 5688736720.

The previous prime is 5688736699. The next prime is 5688736733. The reversal of 5688736721 is 1276378865.

5688736721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4255735696 + 1433001025 = 65236^2 + 37855^2 .

It is a cyclic number.

It is not a de Polignac number, because 5688736721 - 2²⁶ = 5621627857 is a prime.

It is not a weakly prime, because it can be changed into another prime (5688736771) 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, 2844368360 + 2844368361.

It is an arithmetic number, because the mean of its divisors is an integer number (2844368361).

Almost surely, 2^5688736721 is an apocalyptic number.

It is an amenable number.

5688736721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5688736721 is an equidigital number, since it uses as much as digits as its factorization.

5688736721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 53.

The square root of 5688736721 is about 75423.7145796997. The cubic root of 5688736721 is about 1785.1386168170.

The spelling of 5688736721 in words is "five billion, six hundred eighty-eight million, seven hundred thirty-six thousand, seven hundred twenty-one".