989109 has 24 divisors (see below), whose sum is σ = 1589952. Its totient is φ = 587520.

The previous prime is 989099. The next prime is 989119. The reversal of 989109 is 901989.

It is an interprime number because it is at equal distance from previous prime (989099) and next prime (989119).

It is not a de Polignac number, because 989109 - 2¹¹ = 987061 is a prime.

It is a super-2 number, since 2×989109² = 1956673227762, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

989109 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989119) 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 23 ways as a sum of consecutive naturals, for example, 9552 + ... + 9654.

It is an arithmetic number, because the mean of its divisors is an integer number (66248).

2⁹⁸⁹¹⁰⁹ is an apocalyptic number.

989109 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

989109 is a deficient number, since it is larger than the sum of its proper divisors (600843).

989109 is a wasteful number, since it uses less digits than its factorization.

989109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 989109 is about 994.5395919721. The cubic root of 989109 is about 99.6356407021.

The spelling of 989109 in words is "nine hundred eighty-nine thousand, one hundred nine".