9691772117 has 2 divisors, whose sum is σ = 9691772118. Its totient is φ = 9691772116.

The previous prime is 9691772089. The next prime is 9691772183. The reversal of 9691772117 is 7112771969.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9485591236 + 206180881 = 97394^2 + 14359^2 .

It is an emirp because it is prime and its reverse (7112771969) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9691772117 - 2⁶ = 9691772053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9691772317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4845886058 + 4845886059.

It is an arithmetic number, because the mean of its divisors is an integer number (4845886059).

Almost surely, 2^9691772117 is an apocalyptic number.

It is an amenable number.

9691772117 is a deficient number, since it is larger than the sum of its proper divisors (1).

9691772117 is an equidigital number, since it uses as much as digits as its factorization.

9691772117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 333396, while the sum is 50.

The square root of 9691772117 is about 98446.7984090900. The cubic root of 9691772117 is about 2132.0680625445.

The spelling of 9691772117 in words is "nine billion, six hundred ninety-one million, seven hundred seventy-two thousand, one hundred seventeen".