9728161 has 3 divisors (see below), whose sum is σ = 9731281. Its totient is φ = 9725042.

The previous prime is 9728153. The next prime is 9728167. The reversal of 9728161 is 1618279.

It is a happy number.

The square root of 9728161 is 3119.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 9728161 - 2³ = 9728153 is a prime.

It is a Duffinian number.

9728161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9728167) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1560 + ... + 4678.

Almost surely, 2^9728161 is an apocalyptic number.

9728161 is the 3119-th square number.

9728161 is the 1560-th centered octagonal number.

It is an amenable number.

9728161 is a deficient number, since it is larger than the sum of its proper divisors (3120).

9728161 is an frugal number, since it uses more digits than its factorization.

9728161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238 (or 3119 counting only the distinct ones).

The product of its digits is 6048, while the sum is 34.

The cubic root of 9728161 is about 213.4733095576.

It can be divided in two parts, 9728 and 161, that added together give a palindrome (9889).

The spelling of 9728161 in words is "nine million, seven hundred twenty-eight thousand, one hundred sixty-one".