218879 has 4 divisors (see below), whose sum is σ = 223584. Its totient is φ = 214176.

The previous prime is 218873. The next prime is 218887. The reversal of 218879 is 978812.

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 218879 - 2⁸ = 218623 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2282 + ... + 2375.

It is an arithmetic number, because the mean of its divisors is an integer number (55896).

2²¹⁸⁸⁷⁹ is an apocalyptic number.

218879 is a deficient number, since it is larger than the sum of its proper divisors (4705).

218879 is an equidigital number, since it uses as much as digits as its factorization.

218879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704.

The product of its digits is 8064, while the sum is 35.

The square root of 218879 is about 467.8450598222. The cubic root of 218879 is about 60.2653984046.

It can be divided in two parts, 2 and 18879, that added together give a palindrome (18881).

The spelling of 218879 in words is "two hundred eighteen thousand, eight hundred seventy-nine".