9633721 has 2 divisors, whose sum is σ = 9633722. Its totient is φ = 9633720.

The previous prime is 9633691. The next prime is 9633733. The reversal of 9633721 is 1273369.

9633721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7502121 + 2131600 = 2739^2 + 1460^2 .

It is a cyclic number.

It is not a de Polignac number, because 9633721 - 2¹⁵ = 9600953 is a prime.

It is a d-powerful number, because it can be written as 9² + 6³ + 3¹¹ + 3¹³ + 7⁸ + 2²¹ + 1 .

It is not a weakly prime, because it can be changed into another prime (9633751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4816860 + 4816861.

It is an arithmetic number, because the mean of its divisors is an integer number (4816861).

Almost surely, 2^9633721 is an apocalyptic number.

It is an amenable number.

9633721 is a deficient number, since it is larger than the sum of its proper divisors (1).

9633721 is an equidigital number, since it uses as much as digits as its factorization.

9633721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 31.

The square root of 9633721 is about 3103.8236096789. The cubic root of 9633721 is about 212.7802696318.

The spelling of 9633721 in words is "nine million, six hundred thirty-three thousand, seven hundred twenty-one".