8585387989 has 2 divisors, whose sum is σ = 8585387990. Its totient is φ = 8585387988.

The previous prime is 8585387917. The next prime is 8585388037. The reversal of 8585387989 is 9897835858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8542380625 + 43007364 = 92425^2 + 6558^2 .

It is a cyclic number.

It is not a de Polignac number, because 8585387989 - 2¹⁵ = 8585355221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8585387089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4292693994 + 4292693995.

It is an arithmetic number, because the mean of its divisors is an integer number (4292693995).

Almost surely, 2^8585387989 is an apocalyptic number.

It is an amenable number.

8585387989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8585387989 is an equidigital number, since it uses as much as digits as its factorization.

8585387989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174182400, while the sum is 70.

The square root of 8585387989 is about 92657.3687787431. The cubic root of 8585387989 is about 2047.6386046887.

The spelling of 8585387989 in words is "eight billion, five hundred eighty-five million, three hundred eighty-seven thousand, nine hundred eighty-nine".