989569 has 8 divisors (see below), whose sum is σ = 1136960. Its totient is φ = 843696.

The previous prime is 989561. The next prime is 989579. The reversal of 989569 is 965989.

It is a happy number.

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

It is not a de Polignac number, because 989569 - 2³ = 989561 is a prime.

It is a super-2 number, since 2×989569² = 1958493611522, which contains 22 as substring.

It is a Duffinian number.

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, 2422 + ... + 2800.

It is an arithmetic number, because the mean of its divisors is an integer number (142120).

2⁹⁸⁹⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

989569 is a deficient number, since it is larger than the sum of its proper divisors (147391).

989569 is a wasteful number, since it uses less digits than its factorization.

989569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759.

The product of its digits is 174960, while the sum is 46.

The square root of 989569 is about 994.7708278795. The cubic root of 989569 is about 99.6510839921.

The spelling of 989569 in words is "nine hundred eighty-nine thousand, five hundred sixty-nine".