9671209117957 has 2 divisors, whose sum is σ = 9671209117958. Its totient is φ = 9671209117956.

The previous prime is 9671209117789. The next prime is 9671209117981. The reversal of 9671209117957 is 7597119021769.

9671209117957 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., 9577749902436 + 93459215521 = 3094794^2 + 305711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9671209117957 is a prime.

It is a super-2 number, since 2×9671209117957² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9671206117957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4835604558978 + 4835604558979.

It is an arithmetic number, because the mean of its divisors is an integer number (4835604558979).

Almost surely, 2^{9671209117957} is an apocalyptic number.

It is an amenable number.

9671209117957 is a deficient number, since it is larger than the sum of its proper divisors (1).

9671209117957 is an equidigital number, since it uses as much as digits as its factorization.

9671209117957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15002820, while the sum is 64.

The spelling of 9671209117957 in words is "nine trillion, six hundred seventy-one billion, two hundred nine million, one hundred seventeen thousand, nine hundred fifty-seven".