9728197 has 2 divisors, whose sum is σ = 9728198. Its totient is φ = 9728196.

The previous prime is 9728177. The next prime is 9728231. The reversal of 9728197 is 7918279.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9728161 + 36 = 3119^2 + 6^2 .

It is a cyclic number.

It is not a de Polignac number, because 9728197 - 2¹¹ = 9726149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9728167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4864098 + 4864099.

It is an arithmetic number, because the mean of its divisors is an integer number (4864099).

Almost surely, 2^9728197 is an apocalyptic number.

It is an amenable number.

9728197 is a deficient number, since it is larger than the sum of its proper divisors (1).

9728197 is an equidigital number, since it uses as much as digits as its factorization.

9728197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 43.

The square root of 9728197 is about 3119.0057710751. The cubic root of 9728197 is about 213.4735728834.

The spelling of 9728197 in words is "nine million, seven hundred twenty-eight thousand, one hundred ninety-seven".