9671209117789 has 2 divisors, whose sum is σ = 9671209117790. Its totient is φ = 9671209117788.

The previous prime is 9671209117783. The next prime is 9671209117957. The reversal of 9671209117789 is 9877119021769.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9234761265625 + 436447852164 = 3038875^2 + 660642^2 .

It is a cyclic number.

It is not a de Polignac number, because 9671209117789 - 2⁹ = 9671209117277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9671209117783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4835604558894 + 4835604558895.

It is an arithmetic number, because the mean of its divisors is an integer number (4835604558895).

Almost surely, 2^{9671209117789} is an apocalyptic number.

It is an amenable number.

9671209117789 is a deficient number, since it is larger than the sum of its proper divisors (1).

9671209117789 is an equidigital number, since it uses as much as digits as its factorization.

9671209117789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24004512, while the sum is 67.

The spelling of 9671209117789 in words is "nine trillion, six hundred seventy-one billion, two hundred nine million, one hundred seventeen thousand, seven hundred eighty-nine".