289388065 has 16 divisors (see below), whose sum is σ = 356102208. Its totient is φ = 225642816.

The previous prime is 289388041. The next prime is 289388083. The reversal of 289388065 is 560883982.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289388065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125059 + ... + 127351.

It is an arithmetic number, because the mean of its divisors is an integer number (22256388).

Almost surely, 2^289388065 is an apocalyptic number.

It is an amenable number.

289388065 is a deficient number, since it is larger than the sum of its proper divisors (66714143).

289388065 is a wasteful number, since it uses less digits than its factorization.

289388065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928.

The product of its (nonzero) digits is 829440, while the sum is 49.

The square root of 289388065 is about 17011.4098475112. The cubic root of 289388065 is about 661.4446965347. Note that the first 3 decimals are identical.

The spelling of 289388065 in words is "two hundred eighty-nine million, three hundred eighty-eight thousand, sixty-five".