9647 has 4 divisors (see below), whose sum is σ = 10536. Its totient is φ = 8760.

The previous prime is 9643. The next prime is 9649. The reversal of 9647 is 7469.

9647 is digitally balanced in base 3, 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 9647 - 2² = 9643 is a prime.

It is a Duffinian number.

It is a plaindrome in base 6, base 12 and 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 3 ways as a sum of consecutive naturals, for example, 428 + ... + 449.

It is an arithmetic number, because the mean of its divisors is an integer number (2634).

2⁹⁶⁴⁷ is an apocalyptic number.

9647 is the 53-rd centered heptagonal number.

9647 is a deficient number, since it is larger than the sum of its proper divisors (889).

9647 is a wasteful number, since it uses less digits than its factorization.

9647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888.

The product of its digits is 1512, while the sum is 26.

The square root of 9647 is about 98.2191427370. The cubic root of 9647 is about 21.2877989297.

It can be divided in two parts, 9 and 647, that added together give a palindrome (656).

The spelling of 9647 in words is "nine thousand, six hundred forty-seven".