989566579 has 8 divisors (see below), whose sum is σ = 996433920. Its totient is φ = 982720200.

The previous prime is 989566577. The next prime is 989566603. The reversal of 989566579 is 975665989.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 989566579 - 2¹ = 989566577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 989566579.

It is not an unprimeable number, because it can be changed into a prime (989566573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96174 + ... + 105964.

It is an arithmetic number, because the mean of its divisors is an integer number (124554240).

Almost surely, 2^989566579 is an apocalyptic number.

989566579 is a deficient number, since it is larger than the sum of its proper divisors (6867341).

989566579 is a wasteful number, since it uses less digits than its factorization.

989566579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10481.

The product of its digits is 36741600, while the sum is 64.

The square root of 989566579 is about 31457.3771792882. The cubic root of 989566579 is about 996.5100272595.

The spelling of 989566579 in words is "nine hundred eighty-nine million, five hundred sixty-six thousand, five hundred seventy-nine".