989706609 has 24 divisors (see below), whose sum is σ = 1439710272. Its totient is φ = 655146720.

The previous prime is 989706569. The next prime is 989706631. The reversal of 989706609 is 906607989.

It is not a de Polignac number, because 989706609 - 2⁷ = 989706481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989706649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1090734 + ... + 1091640.

It is an arithmetic number, because the mean of its divisors is an integer number (59987928).

Almost surely, 2^989706609 is an apocalyptic number.

It is an amenable number.

989706609 is a deficient number, since it is larger than the sum of its proper divisors (450003663).

989706609 is a wasteful number, since it uses less digits than its factorization.

989706609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 989706609 is about 31459.6028105887. The cubic root of 989706609 is about 996.5570292233.

The spelling of 989706609 in words is "nine hundred eighty-nine million, seven hundred six thousand, six hundred nine".