9267721 has 2 divisors, whose sum is σ = 9267722. Its totient is φ = 9267720.

The previous prime is 9267707. The next prime is 9267761. The reversal of 9267721 is 1277629.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8526400 + 741321 = 2920^2 + 861^2 .

It is an emirp because it is prime and its reverse (1277629) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9267721 - 2⁷ = 9267593 is a prime.

9267721 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9267761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4633860 + 4633861.

It is an arithmetic number, because the mean of its divisors is an integer number (4633861).

Almost surely, 2^9267721 is an apocalyptic number.

It is an amenable number.

9267721 is a deficient number, since it is larger than the sum of its proper divisors (1).

9267721 is an equidigital number, since it uses as much as digits as its factorization.

9267721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 34.

The square root of 9267721 is about 3044.2931856180. The cubic root of 9267721 is about 210.0507889250.

The spelling of 9267721 in words is "nine million, two hundred sixty-seven thousand, seven hundred twenty-one".