8424705689 has 2 divisors, whose sum is σ = 8424705690. Its totient is φ = 8424705688.

The previous prime is 8424705643. The next prime is 8424705721. The reversal of 8424705689 is 9865074248.

8424705689 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., 5691193600 + 2733512089 = 75440^2 + 52283^2 .

It is a cyclic number.

It is not a de Polignac number, because 8424705689 - 2²⁰ = 8423657113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8424705689.

It is not a weakly prime, because it can be changed into another prime (8424705629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4212352844 + 4212352845.

It is an arithmetic number, because the mean of its divisors is an integer number (4212352845).

Almost surely, 2^8424705689 is an apocalyptic number.

It is an amenable number.

8424705689 is a deficient number, since it is larger than the sum of its proper divisors (1).

8424705689 is an equidigital number, since it uses as much as digits as its factorization.

8424705689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The square root of 8424705689 is about 91786.1955252531. The cubic root of 8424705689 is about 2034.7836814255.

The spelling of 8424705689 in words is "eight billion, four hundred twenty-four million, seven hundred five thousand, six hundred eighty-nine".