689098189 has 4 divisors (see below), whose sum is σ = 742105756. Its totient is φ = 636090624.

The previous prime is 689098187. The next prime is 689098237. The reversal of 689098189 is 981890986.

689098189 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 an emirpimes, since its reverse is a distinct semiprime: 981890986 = 2 ⋅490945493.

It can be written as a sum of positive squares in 2 ways, for example, as 89680900 + 599417289 = 9470^2 + 24483^2 .

It is not a de Polignac number, because 689098189 - 2¹ = 689098187 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 (689098181) 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, 26503764 + ... + 26503789.

It is an arithmetic number, because the mean of its divisors is an integer number (185526439).

Almost surely, 2^689098189 is an apocalyptic number.

It is an amenable number.

689098189 is a deficient number, since it is larger than the sum of its proper divisors (53007567).

689098189 is a wasteful number, since it uses less digits than its factorization.

689098189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53007566.

The product of its (nonzero) digits is 2239488, while the sum is 58.

The square root of 689098189 is about 26250.6797816742. The cubic root of 689098189 is about 883.2704532274.

The spelling of 689098189 in words is "six hundred eighty-nine million, ninety-eight thousand, one hundred eighty-nine".