989716579 has 4 divisors (see below), whose sum is σ = 1000837080. Its totient is φ = 978596080.

The previous prime is 989716577. The next prime is 989716613. The reversal of 989716579 is 975617989.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 989716579 - 2¹ = 989716577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989716573) 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, 5560117 + ... + 5560294.

It is an arithmetic number, because the mean of its divisors is an integer number (250209270).

Almost surely, 2^989716579 is an apocalyptic number.

989716579 is a deficient number, since it is larger than the sum of its proper divisors (11120501).

989716579 is a wasteful number, since it uses less digits than its factorization.

989716579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11120500.

The product of its digits is 8573040, while the sum is 61.

The square root of 989716579 is about 31459.7612673714. The cubic root of 989716579 is about 996.5603755484.

The spelling of 989716579 in words is "nine hundred eighty-nine million, seven hundred sixteen thousand, five hundred seventy-nine".