9729641 has 2 divisors, whose sum is σ = 9729642. Its totient is φ = 9729640.

The previous prime is 9729619. The next prime is 9729647. The reversal of 9729641 is 1469279.

9729641 is digitally balanced in base 2, 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., 7311616 + 2418025 = 2704^2 + 1555^2 .

It is a cyclic number.

It is not a de Polignac number, because 9729641 - 2¹⁰ = 9728617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₆₄₇₈₉₄ and since 9729641 and 647894 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 9729595 and 9729604.

It is not a weakly prime, because it can be changed into another prime (9729647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4864820 + 4864821.

It is an arithmetic number, because the mean of its divisors is an integer number (4864821).

Almost surely, 2^9729641 is an apocalyptic number.

It is an amenable number.

9729641 is a deficient number, since it is larger than the sum of its proper divisors (1).

9729641 is an equidigital number, since it uses as much as digits as its factorization.

9729641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 9729641 is about 3119.2372465075. The cubic root of 9729641 is about 213.4841346415.

The spelling of 9729641 in words is "nine million, seven hundred twenty-nine thousand, six hundred forty-one".