9645 has 8 divisors (see below), whose sum is σ = 15456. Its totient is φ = 5136.

The previous prime is 9643. The next prime is 9649. The reversal of 9645 is 5469.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9645 - 2¹ = 9643 is a prime.

It is a super-3 number, since 3×9645³ = 2691708033375, which contains 333 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307 + ... + 336.

It is an arithmetic number, because the mean of its divisors is an integer number (1932).

2⁹⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

9645 is a deficient number, since it is larger than the sum of its proper divisors (5811).

9645 is a wasteful number, since it uses less digits than its factorization.

9645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651.

The product of its digits is 1080, while the sum is 24.

The square root of 9645 is about 98.2089608946. The cubic root of 9645 is about 21.2863277110.

Adding to 9645 its sum of digits (24), we get a palindrome (9669).

It can be divided in two parts, 964 and 5, that added together give a palindrome (969).

The spelling of 9645 in words is "nine thousand, six hundred forty-five".