985708589 has 2 divisors, whose sum is σ = 985708590. Its totient is φ = 985708588.

The previous prime is 985708573. The next prime is 985708639. The reversal of 985708589 is 985807589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 737394025 + 248314564 = 27155^2 + 15758^2 .

It is a cyclic number.

It is not a de Polignac number, because 985708589 - 2⁴ = 985708573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985798589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492854294 + 492854295.

It is an arithmetic number, because the mean of its divisors is an integer number (492854295).

Almost surely, 2^985708589 is an apocalyptic number.

It is an amenable number.

985708589 is a deficient number, since it is larger than the sum of its proper divisors (1).

985708589 is an equidigital number, since it uses as much as digits as its factorization.

985708589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7257600, while the sum is 59.

The square root of 985708589 is about 31395.9963848896. The cubic root of 985708589 is about 995.2133205915.

The spelling of 985708589 in words is "nine hundred eighty-five million, seven hundred eight thousand, five hundred eighty-nine".