9879689 has 2 divisors, whose sum is σ = 9879690. Its totient is φ = 9879688.

The previous prime is 9879659. The next prime is 9879697. The reversal of 9879689 is 9869789.

9879689 is digitally balanced in base 3, 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., 9560464 + 319225 = 3092^2 + 565^2 .

It is an emirp because it is prime and its reverse (9869789) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9879689 is a prime.

It is not a weakly prime, because it can be changed into another prime (9879659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4939844 + 4939845.

It is an arithmetic number, because the mean of its divisors is an integer number (4939845).

Almost surely, 2^9879689 is an apocalyptic number.

It is an amenable number.

9879689 is a deficient number, since it is larger than the sum of its proper divisors (1).

9879689 is an equidigital number, since it uses as much as digits as its factorization.

9879689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 56.

The square root of 9879689 is about 3143.1972575707. The cubic root of 9879689 is about 214.5759733633.

The spelling of 9879689 in words is "nine million, eight hundred seventy-nine thousand, six hundred eighty-nine".