9721752273 has 84 divisors (see below), whose sum is σ = 15342480348. Its totient is φ = 6156259200.

The previous prime is 9721752253. The next prime is 9721752289. The reversal of 9721752273 is 3722571279.

It can be written as a sum of positive squares in 6 ways, for example, as 425514384 + 9296237889 = 20628^2 + 96417^2 .

It is not a de Polignac number, because 9721752273 - 2¹⁷ = 9721621201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9721752203) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 61921911 + ... + 61922067.

Almost surely, 2^9721752273 is an apocalyptic number.

It is an amenable number.

9721752273 is a deficient number, since it is larger than the sum of its proper divisors (5620728075).

9721752273 is a wasteful number, since it uses less digits than its factorization.

9721752273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 290 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 9721752273 is about 98598.9466120202. The cubic root of 9721752273 is about 2134.2642187765.

The spelling of 9721752273 in words is "nine billion, seven hundred twenty-one million, seven hundred fifty-two thousand, two hundred seventy-three".