9721273 has 2 divisors, whose sum is σ = 9721274. Its totient is φ = 9721272.

The previous prime is 9721247. The next prime is 9721301. The reversal of 9721273 is 3721279.

9721273 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., 9437184 + 284089 = 3072^2 + 533^2 .

It is an emirp because it is prime and its reverse (3721279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9721273 - 2⁵ = 9721241 is a prime.

It is not a weakly prime, because it can be changed into another prime (9721373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4860636 + 4860637.

It is an arithmetic number, because the mean of its divisors is an integer number (4860637).

Almost surely, 2^9721273 is an apocalyptic number.

It is an amenable number.

9721273 is a deficient number, since it is larger than the sum of its proper divisors (1).

9721273 is an equidigital number, since it uses as much as digits as its factorization.

9721273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 31.

The square root of 9721273 is about 3117.8956044101. The cubic root of 9721273 is about 213.4229145812.

The spelling of 9721273 in words is "nine million, seven hundred twenty-one thousand, two hundred seventy-three".