989927 has 4 divisors (see below), whose sum is σ = 1048176. Its totient is φ = 931680.

The previous prime is 989921. The next prime is 989929. The reversal of 989927 is 729989.

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 989927 - 2⁸ = 989671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29099 + ... + 29132.

It is an arithmetic number, because the mean of its divisors is an integer number (262044).

2⁹⁸⁹⁹²⁷ is an apocalyptic number.

989927 is a deficient number, since it is larger than the sum of its proper divisors (58249).

989927 is a wasteful number, since it uses less digits than its factorization.

989927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58248.

The product of its digits is 81648, while the sum is 44.

The square root of 989927 is about 994.9507525501. The cubic root of 989927 is about 99.6630995891.

The spelling of 989927 in words is "nine hundred eighty-nine thousand, nine hundred twenty-seven".