9665543 has 4 divisors (see below), whose sum is σ = 10085808. Its totient is φ = 9245280.

The previous prime is 9665527. The next prime is 9665567. The reversal of 9665543 is 3455669.

9665543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9665543 - 2⁴ = 9665527 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 9665497 and 9665506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9665143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210098 + ... + 210143.

It is an arithmetic number, because the mean of its divisors is an integer number (2521452).

Almost surely, 2^9665543 is an apocalyptic number.

9665543 is a deficient number, since it is larger than the sum of its proper divisors (420265).

9665543 is a wasteful number, since it uses less digits than its factorization.

9665543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420264.

The product of its digits is 97200, while the sum is 38.

The square root of 9665543 is about 3108.9456412102. The cubic root of 9665543 is about 213.0142966151.

The spelling of 9665543 in words is "nine million, six hundred sixty-five thousand, five hundred forty-three".