289399 has 4 divisors (see below), whose sum is σ = 315720. Its totient is φ = 263080.

The previous prime is 289397. The next prime is 289417. The reversal of 289399 is 993982.

It is a happy number.

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 289399 - 2¹ = 289397 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289397) 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, 13144 + ... + 13165.

It is an arithmetic number, because the mean of its divisors is an integer number (78930).

2²⁸⁹³⁹⁹ is an apocalyptic number.

289399 is a deficient number, since it is larger than the sum of its proper divisors (26321).

289399 is a wasteful number, since it uses less digits than its factorization.

289399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26320.

The product of its digits is 34992, while the sum is 40.

The square root of 289399 is about 537.9581768130. The cubic root of 289399 is about 66.1453027685.

It can be divided in two parts, 2893 and 99, that added together give a palindrome (2992).

The spelling of 289399 in words is "two hundred eighty-nine thousand, three hundred ninety-nine".