289927 has 4 divisors (see below), whose sum is σ = 316296. Its totient is φ = 263560.

The previous prime is 289897. The next prime is 289937. The reversal of 289927 is 729982.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-289927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289937) 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, 13168 + ... + 13189.

It is an arithmetic number, because the mean of its divisors is an integer number (79074).

2²⁸⁹⁹²⁷ is an apocalyptic number.

289927 is a deficient number, since it is larger than the sum of its proper divisors (26369).

289927 is a wasteful number, since it uses less digits than its factorization.

289927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26368.

The product of its digits is 18144, while the sum is 37.

The square root of 289927 is about 538.4486976491. The cubic root of 289927 is about 66.1855050517.

It can be divided in two parts, 2899 and 27, that added together give a triangular number (2926 = T₇₆).

The spelling of 289927 in words is "two hundred eighty-nine thousand, nine hundred twenty-seven".