9728291 has 2 divisors, whose sum is σ = 9728292. Its totient is φ = 9728290.

The previous prime is 9728281. The next prime is 9728317. The reversal of 9728291 is 1928279.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9728291 - 2¹⁸ = 9466147 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9728231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4864145 + 4864146.

It is an arithmetic number, because the mean of its divisors is an integer number (4864146).

Almost surely, 2^9728291 is an apocalyptic number.

9728291 is a deficient number, since it is larger than the sum of its proper divisors (1).

9728291 is an equidigital number, since it uses as much as digits as its factorization.

9728291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 9728291 is about 3119.0208399432. The cubic root of 9728291 is about 213.4742604535.

The spelling of 9728291 in words is "nine million, seven hundred twenty-eight thousand, two hundred ninety-one".