318869 has 4 divisors (see below), whose sum is σ = 337644. Its totient is φ = 300096.

The previous prime is 318863. The next prime is 318881. The reversal of 318869 is 968813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 968813 = 17 ⋅56989.

It can be written as a sum of positive squares in 2 ways, for example, as 220900 + 97969 = 470^2 + 313^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318869 is a prime.

It is a super-2 number, since 2×318869² = 203354878322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318863) 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, 9362 + ... + 9395.

It is an arithmetic number, because the mean of its divisors is an integer number (84411).

2³¹⁸⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

318869 is a deficient number, since it is larger than the sum of its proper divisors (18775).

318869 is a wasteful number, since it uses less digits than its factorization.

318869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18774.

The product of its digits is 10368, while the sum is 35.

The square root of 318869 is about 564.6848678688. The cubic root of 318869 is about 68.3183601273.

The spelling of 318869 in words is "three hundred eighteen thousand, eight hundred sixty-nine".