9896909657 has 2 divisors, whose sum is σ = 9896909658. Its totient is φ = 9896909656.

The previous prime is 9896909651. The next prime is 9896909717. The reversal of 9896909657 is 7569096989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7662551296 + 2234358361 = 87536^2 + 47269^2 .

It is a cyclic number.

It is not a de Polignac number, because 9896909657 - 2⁶ = 9896909593 is a prime.

It is not a weakly prime, because it can be changed into another prime (9896909651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948454828 + 4948454829.

It is an arithmetic number, because the mean of its divisors is an integer number (4948454829).

Almost surely, 2^9896909657 is an apocalyptic number.

It is an amenable number.

9896909657 is a deficient number, since it is larger than the sum of its proper divisors (1).

9896909657 is an equidigital number, since it uses as much as digits as its factorization.

9896909657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 66134880, while the sum is 68.

The square root of 9896909657 is about 99483.2129406766. The cubic root of 9896909657 is about 2147.0057223790.

The spelling of 9896909657 in words is "nine billion, eight hundred ninety-six million, nine hundred nine thousand, six hundred fifty-seven".