9689885789 has 2 divisors, whose sum is σ = 9689885790. Its totient is φ = 9689885788.

The previous prime is 9689885773. The next prime is 9689885819. The reversal of 9689885789 is 9875889869.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8861021689 + 828864100 = 94133^2 + 28790^2 .

It is an emirp because it is prime and its reverse (9875889869) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9689885789 - 2⁴ = 9689885773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9689885089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4844942894 + 4844942895.

It is an arithmetic number, because the mean of its divisors is an integer number (4844942895).

Almost surely, 2^9689885789 is an apocalyptic number.

It is an amenable number.

9689885789 is a deficient number, since it is larger than the sum of its proper divisors (1).

9689885789 is an equidigital number, since it uses as much as digits as its factorization.

9689885789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 627056640, while the sum is 77.

The square root of 9689885789 is about 98437.2174992772. The cubic root of 9689885789 is about 2131.9297307518.

The spelling of 9689885789 in words is "nine billion, six hundred eighty-nine million, eight hundred eighty-five thousand, seven hundred eighty-nine".