9624721 has 2 divisors, whose sum is σ = 9624722. Its totient is φ = 9624720.

The previous prime is 9624691. The next prime is 9624761. The reversal of 9624721 is 1274269.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9363600 + 261121 = 3060^2 + 511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9624721 is a prime.

It is not a weakly prime, because it can be changed into another prime (9624761) 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, 4812360 + 4812361.

It is an arithmetic number, because the mean of its divisors is an integer number (4812361).

Almost surely, 2^9624721 is an apocalyptic number.

It is an amenable number.

9624721 is a deficient number, since it is larger than the sum of its proper divisors (1).

9624721 is an equidigital number, since it uses as much as digits as its factorization.

9624721 is an odious number, because the sum of its binary digits is odd.

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

The square root of 9624721 is about 3102.3734462505. The cubic root of 9624721 is about 212.7139879017.

The spelling of 9624721 in words is "nine million, six hundred twenty-four thousand, seven hundred twenty-one".