9681907513 has 2 divisors, whose sum is σ = 9681907514. Its totient is φ = 9681907512.

The previous prime is 9681907511. The next prime is 9681907537. The reversal of 9681907513 is 3157091869.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5701307049 + 3980600464 = 75507^2 + 63092^2 .

It is a cyclic number.

It is not a de Polignac number, because 9681907513 - 2¹ = 9681907511 is a prime.

Together with 9681907511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9681907511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4840953756 + 4840953757.

It is an arithmetic number, because the mean of its divisors is an integer number (4840953757).

Almost surely, 2^9681907513 is an apocalyptic number.

It is an amenable number.

9681907513 is a deficient number, since it is larger than the sum of its proper divisors (1).

9681907513 is an equidigital number, since it uses as much as digits as its factorization.

9681907513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 9681907513 is about 98396.6844614187. The cubic root of 9681907513 is about 2131.3444540166.

The spelling of 9681907513 in words is "nine billion, six hundred eighty-one million, nine hundred seven thousand, five hundred thirteen".