989567 has 4 divisors (see below), whose sum is σ = 1023720. Its totient is φ = 955416.

The previous prime is 989561. The next prime is 989579. The reversal of 989567 is 765989.

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 989567 - 2¹² = 985471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989567.

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 3 ways as a sum of consecutive naturals, for example, 17033 + ... + 17090.

It is an arithmetic number, because the mean of its divisors is an integer number (255930).

2⁹⁸⁹⁵⁶⁷ is an apocalyptic number.

989567 is a deficient number, since it is larger than the sum of its proper divisors (34153).

989567 is a wasteful number, since it uses less digits than its factorization.

989567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34152.

The product of its digits is 136080, while the sum is 44.

The square root of 989567 is about 994.7698226223. The cubic root of 989567 is about 99.6510168577.

The spelling of 989567 in words is "nine hundred eighty-nine thousand, five hundred sixty-seven".