9721733425 has 12 divisors (see below), whose sum is σ = 12056205040. Its totient is φ = 7776576720.

The previous prime is 9721733381. The next prime is 9721733431. The reversal of 9721733425 is 5243371279.

9721733425 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9721733425 - 2¹⁹ = 9721209137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 378646 + ... + 403504.

Almost surely, 2^9721733425 is an apocalyptic number.

It is an amenable number.

9721733425 is a deficient number, since it is larger than the sum of its proper divisors (2334471615).

9721733425 is a wasteful number, since it uses less digits than its factorization.

9721733425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40512 (or 40507 counting only the distinct ones).

The product of its digits is 317520, while the sum is 43.

The square root of 9721733425 is about 98598.8510328594. The cubic root of 9721733425 is about 2134.2628395108.

The spelling of 9721733425 in words is "nine billion, seven hundred twenty-one million, seven hundred thirty-three thousand, four hundred twenty-five".