9573448721 has 4 divisors (see below), whose sum is σ = 9668235444. Its totient is φ = 9478662000.

The previous prime is 9573448693. The next prime is 9573448739. The reversal of 9573448721 is 1278443759.

9573448721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1278443759 = 101 ⋅12657859.

It can be written as a sum of positive squares in 2 ways, for example, as 7263300625 + 2310148096 = 85225^2 + 48064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9573448721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9573448721.

It is not an unprimeable number, because it can be changed into a prime (9573448771) 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 in 3 ways as a sum of consecutive naturals, for example, 47393210 + ... + 47393411.

It is an arithmetic number, because the mean of its divisors is an integer number (2417058861).

Almost surely, 2^9573448721 is an apocalyptic number.

It is an amenable number.

9573448721 is a deficient number, since it is larger than the sum of its proper divisors (94786723).

9573448721 is a wasteful number, since it uses less digits than its factorization.

9573448721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94786722.

The product of its digits is 1693440, while the sum is 50.

The square root of 9573448721 is about 97844.0019674175. The cubic root of 9573448721 is about 2123.3559580806.

The spelling of 9573448721 in words is "nine billion, five hundred seventy-three million, four hundred forty-eight thousand, seven hundred twenty-one".