9728651 has 2 divisors, whose sum is σ = 9728652. Its totient is φ = 9728650.

The previous prime is 9728639. The next prime is 9728681. The reversal of 9728651 is 1568279.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9728651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9728611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4864325 + 4864326.

It is an arithmetic number, because the mean of its divisors is an integer number (4864326).

Almost surely, 2^9728651 is an apocalyptic number.

9728651 is a deficient number, since it is larger than the sum of its proper divisors (1).

9728651 is an equidigital number, since it uses as much as digits as its factorization.

9728651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 9728651 is about 3119.0785498285. The cubic root of 9728651 is about 213.4768936596.

The spelling of 9728651 in words is "nine million, seven hundred twenty-eight thousand, six hundred fifty-one".