989585521 has 8 divisors (see below), whose sum is σ = 1061061120. Its totient is φ = 919583808.

The previous prime is 989585507. The next prime is 989585537. The reversal of 989585521 is 125585989.

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 989585521 - 2¹⁷ = 989454449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989585221) 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, 367081 + ... + 369766.

It is an arithmetic number, because the mean of its divisors is an integer number (132632640).

Almost surely, 2^989585521 is an apocalyptic number.

It is an amenable number.

989585521 is a deficient number, since it is larger than the sum of its proper divisors (71475599).

989585521 is a wasteful number, since it uses less digits than its factorization.

989585521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736943.

The product of its digits is 1296000, while the sum is 52.

The square root of 989585521 is about 31457.6782518990. The cubic root of 989585521 is about 996.5163855221.

The spelling of 989585521 in words is "nine hundred eighty-nine million, five hundred eighty-five thousand, five hundred twenty-one".