9722 has 4 divisors (see below), whose sum is σ = 14586.
Its totient is φ = 4860.
The previous prime is 9721. The next prime is 9733. The reversal of 9722 is 2279.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2279 = 43 ⋅53.
It can be written as a sum of positive squares in only one way, i.e., 6241 + 3481 = 79^2 + 59^2
It is a plaindrome in base 13.
It is a nialpdrome in base 10.
It is a junction number, because it is equal to n+sod(n) for n = 9694 and 9703.
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 as a sum of consecutive naturals, namely, 2429 + ... + 2432.
29722 is an apocalyptic number.
9722 is a deficient number, since it is larger than the sum of its proper divisors (4864).
9722 is a wasteful number, since it uses less digits than its factorization.
9722 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4863.
The product of its digits is 252, while the sum is 20.
The square root of 9722 is about 98.6002028395.
The cubic root of 9722 is about 21.3428234687.
The spelling of 9722 in words is "nine thousand, seven hundred twenty-two".