985858589 has 2 divisors, whose sum is σ = 985858590. Its totient is φ = 985858588.

The previous prime is 985858583. The next prime is 985858633.

985858589 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 958212025 + 27646564 = 30955^2 + 5258^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 985858589 - 2⁸ = 985858333 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985858583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492929294 + 492929295.

It is an arithmetic number, because the mean of its divisors is an integer number (492929295).

Almost surely, 2^985858589 is an apocalyptic number.

It is an amenable number.

985858589 is a deficient number, since it is larger than the sum of its proper divisors (1).

985858589 is an equidigital number, since it uses as much as digits as its factorization.

985858589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472000, while the sum is 65.

The square root of 985858589 is about 31398.3851336339. The cubic root of 985858589 is about 995.2638001579.

The spelling of 985858589 in words is "nine hundred eighty-five million, eight hundred fifty-eight thousand, five hundred eighty-nine".