9720049397 has 2 divisors, whose sum is σ = 9720049398. Its totient is φ = 9720049396.

The previous prime is 9720049373. The next prime is 9720049403. The reversal of 9720049397 is 7939400279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6615219556 + 3104829841 = 81334^2 + 55721^2 .

It is a cyclic number.

It is not a de Polignac number, because 9720049397 - 2³² = 5425082101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9720049357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4860024698 + 4860024699.

It is an arithmetic number, because the mean of its divisors is an integer number (4860024699).

Almost surely, 2^9720049397 is an apocalyptic number.

It is an amenable number.

9720049397 is a deficient number, since it is larger than the sum of its proper divisors (1).

9720049397 is an equidigital number, since it uses as much as digits as its factorization.

9720049397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 50.

The square root of 9720049397 is about 98590.3108677521. The cubic root of 9720049397 is about 2134.1395979113.

The spelling of 9720049397 in words is "nine billion, seven hundred twenty million, forty-nine thousand, three hundred ninety-seven".