289409065 has 8 divisors (see below), whose sum is σ = 378862848. Its totient is φ = 210479280.

The previous prime is 289409053. The next prime is 289409089. The reversal of 289409065 is 560904982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 289409065 - 2¹¹ = 289407017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2630937 + ... + 2631046.

It is an arithmetic number, because the mean of its divisors is an integer number (47357856).

Almost surely, 2^289409065 is an apocalyptic number.

It is an amenable number.

289409065 is a deficient number, since it is larger than the sum of its proper divisors (89453783).

289409065 is a wasteful number, since it uses less digits than its factorization.

289409065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5261999.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 289409065 is about 17012.0270691061. The cubic root of 289409065 is about 661.4606958154.

The spelling of 289409065 in words is "two hundred eighty-nine million, four hundred nine thousand, sixty-five".