9728997 has 4 divisors (see below), whose sum is σ = 12972000. Its totient is φ = 6485996.

The previous prime is 9728941. The next prime is 9729017. The reversal of 9728997 is 7998279.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9728997 - 2⁶ = 9728933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9728197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1621497 + ... + 1621502.

It is an arithmetic number, because the mean of its divisors is an integer number (3243000).

Almost surely, 2^9728997 is an apocalyptic number.

It is an amenable number.

9728997 is a deficient number, since it is larger than the sum of its proper divisors (3243003).

9728997 is a wasteful number, since it uses less digits than its factorization.

9728997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3243002.

The product of its digits is 571536, while the sum is 51.

The square root of 9728997 is about 3119.1340144341. The cubic root of 9728997 is about 213.4794244020.

The spelling of 9728997 in words is "nine million, seven hundred twenty-eight thousand, nine hundred ninety-seven".