9681567697 has 2 divisors, whose sum is σ = 9681567698. Its totient is φ = 9681567696.

The previous prime is 9681567689. The next prime is 9681567703. The reversal of 9681567697 is 7967651869.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5161560336 + 4520007361 = 71844^2 + 67231^2 .

It is an emirp because it is prime and its reverse (7967651869) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9681567697 - 2³ = 9681567689 is a prime.

It is not a weakly prime, because it can be changed into another prime (9681547697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4840783848 + 4840783849.

It is an arithmetic number, because the mean of its divisors is an integer number (4840783849).

Almost surely, 2^9681567697 is an apocalyptic number.

It is an amenable number.

9681567697 is a deficient number, since it is larger than the sum of its proper divisors (1).

9681567697 is an equidigital number, since it uses as much as digits as its factorization.

9681567697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34292160, while the sum is 64.

The square root of 9681567697 is about 98394.9576807674. The cubic root of 9681567697 is about 2131.3195183855.

The spelling of 9681567697 in words is "nine billion, six hundred eighty-one million, five hundred sixty-seven thousand, six hundred ninety-seven".