289006565 has 16 divisors (see below), whose sum is σ = 353082240. Its totient is φ = 227048640.

The previous prime is 289006559. The next prime is 289006573. The reversal of 289006565 is 565600982.

It is a de Polignac number, because none of the positive numbers 2^k-289006565 is a prime.

It is a super-2 number, since 2×289006565² = 167049589226198450, which contains 22 as substring.

It is a Curzon number.

It is a congruent 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, 96866 + ... + 99804.

It is an arithmetic number, because the mean of its divisors is an integer number (22067640).

Almost surely, 2^289006565 is an apocalyptic number.

It is an amenable number.

289006565 is a deficient number, since it is larger than the sum of its proper divisors (64075675).

289006565 is a wasteful number, since it uses less digits than its factorization.

289006565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3292.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 289006565 is about 17000.1930871387. The cubic root of 289006565 is about 661.1539080853.

The spelling of 289006565 in words is "two hundred eighty-nine million, six thousand, five hundred sixty-five".