9643663697 has 2 divisors, whose sum is σ = 9643663698. Its totient is φ = 9643663696.

The previous prime is 9643663691. The next prime is 9643663699. The reversal of 9643663697 is 7963663469.

9643663697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8613510481 + 1030153216 = 92809^2 + 32096^2 .

It is an emirp because it is prime and its reverse (7963663469) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9643663697 - 2⁴ = 9643663681 is a prime.

Together with 9643663699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9643663691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4821831848 + 4821831849.

It is an arithmetic number, because the mean of its divisors is an integer number (4821831849).

Almost surely, 2^9643663697 is an apocalyptic number.

It is an amenable number.

9643663697 is a deficient number, since it is larger than the sum of its proper divisors (1).

9643663697 is an equidigital number, since it uses as much as digits as its factorization.

9643663697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26453952, while the sum is 59.

The square root of 9643663697 is about 98202.1572930045. The cubic root of 9643663697 is about 2128.5344600689.

The spelling of 9643663697 in words is "nine billion, six hundred forty-three million, six hundred sixty-three thousand, six hundred ninety-seven".