5728087721 has 2 divisors, whose sum is σ = 5728087722. Its totient is φ = 5728087720.

The previous prime is 5728087711. The next prime is 5728087727. The reversal of 5728087721 is 1277808275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3920137321 + 1807950400 = 62611^2 + 42520^2 .

It is a cyclic number.

It is not a de Polignac number, because 5728087721 - 2¹⁰ = 5728086697 is a prime.

It is not a weakly prime, because it can be changed into another prime (5728087727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2864043860 + 2864043861.

It is an arithmetic number, because the mean of its divisors is an integer number (2864043861).

Almost surely, 2^5728087721 is an apocalyptic number.

It is an amenable number.

5728087721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5728087721 is an equidigital number, since it uses as much as digits as its factorization.

5728087721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 439040, while the sum is 47.

The square root of 5728087721 is about 75684.1312363431. The cubic root of 5728087721 is about 1789.2453068343.

The spelling of 5728087721 in words is "five billion, seven hundred twenty-eight million, eighty-seven thousand, seven hundred twenty-one".