318389 has 8 divisors (see below), whose sum is σ = 337920. Its totient is φ = 299376.

The previous prime is 318377. The next prime is 318403. The reversal of 318389 is 983813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318389 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 (318319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2444 + ... + 2570.

It is an arithmetic number, because the mean of its divisors is an integer number (42240).

2³¹⁸³⁸⁹ is an apocalyptic number.

It is an amenable number.

318389 is a deficient number, since it is larger than the sum of its proper divisors (19531).

318389 is a wasteful number, since it uses less digits than its factorization.

318389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259.

The product of its digits is 5184, while the sum is 32.

The square root of 318389 is about 564.2596919859. The cubic root of 318389 is about 68.2840625723.

It can be divided in two parts, 318 and 389, that added together give a palindrome (707).

The spelling of 318389 in words is "three hundred eighteen thousand, three hundred eighty-nine".