9897716057 has 2 divisors, whose sum is σ = 9897716058. Its totient is φ = 9897716056.

The previous prime is 9897716011. The next prime is 9897716083. The reversal of 9897716057 is 7506177989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9611057296 + 286658761 = 98036^2 + 16931^2 .

It is a cyclic number.

It is not a de Polignac number, because 9897716057 - 2²⁰ = 9896667481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9897715987 and 9897716005.

It is not a weakly prime, because it can be changed into another prime (9897716357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948858028 + 4948858029.

It is an arithmetic number, because the mean of its divisors is an integer number (4948858029).

Almost surely, 2^9897716057 is an apocalyptic number.

It is an amenable number.

9897716057 is a deficient number, since it is larger than the sum of its proper divisors (1).

9897716057 is an equidigital number, since it uses as much as digits as its factorization.

9897716057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6667920, while the sum is 59.

The square root of 9897716057 is about 99487.2658032172. The cubic root of 9897716057 is about 2147.0640334563.

The spelling of 9897716057 in words is "nine billion, eight hundred ninety-seven million, seven hundred sixteen thousand, fifty-seven".