988189 has 4 divisors (see below), whose sum is σ = 990880. Its totient is φ = 985500.

The previous prime is 988157. The next prime is 988199. The reversal of 988189 is 981889.

988189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 988189 - 2⁵ = 988157 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 (988109) 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, 687 + ... + 1564.

It is an arithmetic number, because the mean of its divisors is an integer number (247720).

2⁹⁸⁸¹⁸⁹ is an apocalyptic number.

It is an amenable number.

988189 is a deficient number, since it is larger than the sum of its proper divisors (2691).

988189 is a wasteful number, since it uses less digits than its factorization.

988189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690.

The product of its digits is 41472, while the sum is 43.

The square root of 988189 is about 994.0769587914. The cubic root of 988189 is about 99.6047397518.

The spelling of 988189 in words is "nine hundred eighty-eight thousand, one hundred eighty-nine".