289487 has 4 divisors (see below), whose sum is σ = 315816. Its totient is φ = 263160.

The previous prime is 289477. The next prime is 289489. The reversal of 289487 is 784982.

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 289487 - 2⁶ = 289423 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 289487.

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 289487.

It is not an unprimeable number, because it can be changed into a prime (289489) 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, 13148 + ... + 13169.

It is an arithmetic number, because the mean of its divisors is an integer number (78954).

2²⁸⁹⁴⁸⁷ is an apocalyptic number.

289487 is a deficient number, since it is larger than the sum of its proper divisors (26329).

289487 is a wasteful number, since it uses less digits than its factorization.

289487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26328.

The product of its digits is 32256, while the sum is 38.

The square root of 289487 is about 538.0399613412. The cubic root of 289487 is about 66.1520065428.

The spelling of 289487 in words is "two hundred eighty-nine thousand, four hundred eighty-seven".