989521 has 8 divisors (see below), whose sum is σ = 1077440. Its totient is φ = 903312.

The previous prime is 989507. The next prime is 989533. The reversal of 989521 is 125989.

989521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 989521 - 2¹¹ = 987473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989561) 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, 970 + ... + 1708.

It is an arithmetic number, because the mean of its divisors is an integer number (134680).

2⁹⁸⁹⁵²¹ is an apocalyptic number.

It is an amenable number.

989521 is a deficient number, since it is larger than the sum of its proper divisors (87919).

989521 is a wasteful number, since it uses less digits than its factorization.

989521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855.

The product of its digits is 6480, while the sum is 34.

The square root of 989521 is about 994.7467014271. The cubic root of 989521 is about 99.6494727420.

The spelling of 989521 in words is "nine hundred eighty-nine thousand, five hundred twenty-one".