289693609 has 4 divisors (see below), whose sum is σ = 297523204. Its totient is φ = 281864016.

The previous prime is 289693597. The next prime is 289693631. The reversal of 289693609 is 906396982.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906396982 = 2 ⋅453198491.

It can be written as a sum of positive squares in 2 ways, for example, as 243453609 + 46240000 = 15603^2 + 6800^2 .

It is a cyclic number.

It is not a de Polignac number, because 289693609 - 2¹¹ = 289691561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289693639) 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, 3914742 + ... + 3914815.

It is an arithmetic number, because the mean of its divisors is an integer number (74380801).

Almost surely, 2^289693609 is an apocalyptic number.

It is an amenable number.

289693609 is a deficient number, since it is larger than the sum of its proper divisors (7829595).

289693609 is an equidigital number, since it uses as much as digits as its factorization.

289693609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7829594.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 289693609 is about 17020.3880390548. The cubic root of 289693609 is about 661.6774052474.

The spelling of 289693609 in words is "two hundred eighty-nine million, six hundred ninety-three thousand, six hundred nine".