289879 has 4 divisors (see below), whose sum is σ = 291384. Its totient is φ = 288376.

The previous prime is 289871. The next prime is 289889. The reversal of 289879 is 978982.

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

It is a cyclic number.

It is not a de Polignac number, because 289879 - 2³ = 289871 is a prime.

It is an Ulam number.

It is a Duffinian number.

289879 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289871) 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, 412 + ... + 865.

It is an arithmetic number, because the mean of its divisors is an integer number (72846).

2²⁸⁹⁸⁷⁹ is an apocalyptic number.

289879 is a deficient number, since it is larger than the sum of its proper divisors (1505).

289879 is a wasteful number, since it uses less digits than its factorization.

289879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504.

The product of its digits is 72576, while the sum is 43.

The square root of 289879 is about 538.4041233126. The cubic root of 289879 is about 66.1818523166.

The spelling of 289879 in words is "two hundred eighty-nine thousand, eight hundred seventy-nine".