989287 has 4 divisors (see below), whose sum is σ = 1065400. Its totient is φ = 913176.

The previous prime is 989279. The next prime is 989293. The reversal of 989287 is 782989.

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 989287 - 2³ = 989279 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38037 + ... + 38062.

It is an arithmetic number, because the mean of its divisors is an integer number (266350).

2⁹⁸⁹²⁸⁷ is an apocalyptic number.

989287 is a deficient number, since it is larger than the sum of its proper divisors (76113).

989287 is a wasteful number, since it uses less digits than its factorization.

989287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76112.

The product of its digits is 72576, while the sum is 43.

The square root of 989287 is about 994.6290765909. The cubic root of 989287 is about 99.6416171517.

The spelling of 989287 in words is "nine hundred eighty-nine thousand, two hundred eighty-seven".