985663489 has 4 divisors (see below), whose sum is σ = 985727556. Its totient is φ = 985599424.

The previous prime is 985663477. The next prime is 985663537. The reversal of 985663489 is 984366589.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 586463089 + 399200400 = 24217^2 + 19980^2 .

It is a cyclic number.

It is not a de Polignac number, because 985663489 - 2⁵ = 985663457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (985663409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6477 + ... + 44869.

It is an arithmetic number, because the mean of its divisors is an integer number (246431889).

Almost surely, 2^985663489 is an apocalyptic number.

It is an amenable number.

985663489 is a deficient number, since it is larger than the sum of its proper divisors (64067).

985663489 is a wasteful number, since it uses less digits than its factorization.

985663489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64066.

The product of its digits is 11197440, while the sum is 58.

The square root of 985663489 is about 31395.2781322287. The cubic root of 985663489 is about 995.1981420672.

The spelling of 985663489 in words is "nine hundred eighty-five million, six hundred sixty-three thousand, four hundred eighty-nine".