9720197 has 2 divisors, whose sum is σ = 9720198. Its totient is φ = 9720196.

The previous prime is 9720163. The next prime is 9720203. The reversal of 9720197 is 7910279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8014561 + 1705636 = 2831^2 + 1306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9720197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9720097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4860098 + 4860099.

It is an arithmetic number, because the mean of its divisors is an integer number (4860099).

Almost surely, 2^9720197 is an apocalyptic number.

It is an amenable number.

9720197 is a deficient number, since it is larger than the sum of its proper divisors (1).

9720197 is an equidigital number, since it uses as much as digits as its factorization.

9720197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 9720197 is about 3117.7230473536. The cubic root of 9720197 is about 213.4150400456.

The spelling of 9720197 in words is "nine million, seven hundred twenty thousand, one hundred ninety-seven".