289117 has 4 divisors (see below), whose sum is σ = 291456. Its totient is φ = 286780.

The previous prime is 289111. The next prime is 289127. The reversal of 289117 is 711982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 289117 - 2³ = 289109 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289111) 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, 973 + ... + 1234.

It is an arithmetic number, because the mean of its divisors is an integer number (72864).

2²⁸⁹¹¹⁷ is an apocalyptic number.

It is an amenable number.

289117 is a deficient number, since it is larger than the sum of its proper divisors (2339).

289117 is a wasteful number, since it uses less digits than its factorization.

289117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338.

The product of its digits is 1008, while the sum is 28.

The square root of 289117 is about 537.6960107719. The cubic root of 289117 is about 66.1238110594.

It can be divided in two parts, 289 and 117, that added together give a triangular number (406 = T₂₈).

The spelling of 289117 in words is "two hundred eighty-nine thousand, one hundred seventeen".