9647221 has 2 divisors, whose sum is σ = 9647222. Its totient is φ = 9647220.

The previous prime is 9647213. The next prime is 9647237. The reversal of 9647221 is 1227469.

9647221 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., 8916196 + 731025 = 2986^2 + 855^2 .

It is an emirp because it is prime and its reverse (1227469) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9647221 - 2³ = 9647213 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9647251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4823610 + 4823611.

It is an arithmetic number, because the mean of its divisors is an integer number (4823611).

Almost surely, 2^9647221 is an apocalyptic number.

It is an amenable number.

9647221 is a deficient number, since it is larger than the sum of its proper divisors (1).

9647221 is an equidigital number, since it uses as much as digits as its factorization.

9647221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 9647221 is about 3105.9975853178. The cubic root of 9647221 is about 212.8796148691.

The spelling of 9647221 in words is "nine million, six hundred forty-seven thousand, two hundred twenty-one".