9748741721 has 2 divisors, whose sum is σ = 9748741722. Its totient is φ = 9748741720.

The previous prime is 9748741699. The next prime is 9748741747. The reversal of 9748741721 is 1271478479.

9748741721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7503024400 + 2245717321 = 86620^2 + 47389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9748741721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9748741721.

It is not a weakly prime, because it can be changed into another prime (9748741921) 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, 4874370860 + 4874370861.

It is an arithmetic number, because the mean of its divisors is an integer number (4874370861).

Almost surely, 2^9748741721 is an apocalyptic number.

It is an amenable number.

9748741721 is a deficient number, since it is larger than the sum of its proper divisors (1).

9748741721 is an equidigital number, since it uses as much as digits as its factorization.

9748741721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 790272, while the sum is 50.

The square root of 9748741721 is about 98735.7165416852. The cubic root of 9748741721 is about 2136.2374360971.

The spelling of 9748741721 in words is "nine billion, seven hundred forty-eight million, seven hundred forty-one thousand, seven hundred twenty-one".