985044689 has 2 divisors, whose sum is σ = 985044690. Its totient is φ = 985044688.

The previous prime is 985044649. The next prime is 985044701. The reversal of 985044689 is 986440589.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 920515600 + 64529089 = 30340^2 + 8033^2 .

It is a cyclic number.

It is not a de Polignac number, because 985044689 - 2²⁴ = 968267473 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 985044689.

It is not a weakly prime, because it can be changed into another prime (985044649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492522344 + 492522345.

It is an arithmetic number, because the mean of its divisors is an integer number (492522345).

Almost surely, 2^985044689 is an apocalyptic number.

It is an amenable number.

985044689 is a deficient number, since it is larger than the sum of its proper divisors (1).

985044689 is an equidigital number, since it uses as much as digits as its factorization.

985044689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 985044689 is about 31385.4215998447. The cubic root of 985044689 is about 994.9898365165.

The spelling of 985044689 in words is "nine hundred eighty-five million, forty-four thousand, six hundred eighty-nine".