289979 has 4 divisors (see below), whose sum is σ = 291984. Its totient is φ = 287976.

The previous prime is 289973. The next prime is 289987. The reversal of 289979 is 979982.

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 289979 - 2¹⁶ = 224443 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 289979.

It is not an unprimeable number, because it can be changed into a prime (289973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767 + ... + 1080.

It is an arithmetic number, because the mean of its divisors is an integer number (72996).

2²⁸⁹⁹⁷⁹ is an apocalyptic number.

289979 is a deficient number, since it is larger than the sum of its proper divisors (2005).

289979 is a wasteful number, since it uses less digits than its factorization.

289979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004.

The product of its digits is 81648, while the sum is 44.

The square root of 289979 is about 538.4969823499. The cubic root of 289979 is about 66.1894617265.

The spelling of 289979 in words is "two hundred eighty-nine thousand, nine hundred seventy-nine".