9748402721 has 2 divisors, whose sum is σ = 9748402722. Its totient is φ = 9748402720.

The previous prime is 9748402711. The next prime is 9748402757. The reversal of 9748402721 is 1272048479.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5381836321 + 4366566400 = 73361^2 + 66080^2 .

It is a cyclic number.

It is not a de Polignac number, because 9748402721 - 2¹⁰ = 9748401697 is a prime.

It is a super-2 number, since 2×9748402721² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9748402711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4874201360 + 4874201361.

It is an arithmetic number, because the mean of its divisors is an integer number (4874201361).

Almost surely, 2^9748402721 is an apocalyptic number.

It is an amenable number.

9748402721 is a deficient number, since it is larger than the sum of its proper divisors (1).

9748402721 is an equidigital number, since it uses as much as digits as its factorization.

9748402721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 9748402721 is about 98733.9998227561. Note that the first 3 decimals coincide. The cubic root of 9748402721 is about 2136.2126741704.

The spelling of 9748402721 in words is "nine billion, seven hundred forty-eight million, four hundred two thousand, seven hundred twenty-one".