9643641 has 36 divisors (see below), whose sum is σ = 15959088. Its totient is φ = 5163648.

The previous prime is 9643603. The next prime is 9643661. The reversal of 9643641 is 1463469.

9643641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9643641 - 2⁶ = 9643577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9643661) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 42370 + ... + 42596.

It is an arithmetic number, because the mean of its divisors is an integer number (443308).

Almost surely, 2^9643641 is an apocalyptic number.

It is an amenable number.

9643641 is a deficient number, since it is larger than the sum of its proper divisors (6315447).

9643641 is a wasteful number, since it uses less digits than its factorization.

9643641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 254 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 9643641 is about 3105.4212274666. The cubic root of 9643641 is about 212.8532790185.

The spelling of 9643641 in words is "nine million, six hundred forty-three thousand, six hundred forty-one".