9723 has 8 divisors (see below), whose sum is σ = 14848. Its totient is φ = 5544.

The previous prime is 9721. The next prime is 9733. The reversal of 9723 is 3279.

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

It is not a de Polignac number, because 9723 - 2¹ = 9721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 463 = 9723 / (9 + 7 + 2 + 3).

It is a d-powerful number, because it can be written as 9³ + 2⁵ + 7⁴ + 3⁸ .

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 9723.

It is not an unprimeable number, because it can be changed into a prime (9721) 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, 211 + ... + 252.

It is an arithmetic number, because the mean of its divisors is an integer number (1856).

2⁹⁷²³ is an apocalyptic number.

9723 is a deficient number, since it is larger than the sum of its proper divisors (5125).

9723 is a wasteful number, since it uses less digits than its factorization.

9723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473.

The product of its digits is 378, while the sum is 21.

The square root of 9723 is about 98.6052736926. The cubic root of 9723 is about 21.3435552142.

Adding to 9723 its product of digits (378), we get a palindrome (10101).

It can be divided in two parts, 972 and 3, that multiplied together give a square (2916 = 54²).

The spelling of 9723 in words is "nine thousand, seven hundred twenty-three".