868219 has 4 divisors (see below), whose sum is σ = 947160. Its totient is φ = 789280.

The previous prime is 868211. The next prime is 868229. The reversal of 868219 is 912868.

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 868219 - 2³ = 868211 is a prime.

It is a super-2 number, since 2×868219² = 1507608463922, which contains 22 as substring.

It is a Duffinian number.

868219 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (868211) 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, 39454 + ... + 39475.

It is an arithmetic number, because the mean of its divisors is an integer number (236790).

2⁸⁶⁸²¹⁹ is an apocalyptic number.

868219 is a deficient number, since it is larger than the sum of its proper divisors (78941).

868219 is a wasteful number, since it uses less digits than its factorization.

868219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78940.

The product of its digits is 6912, while the sum is 34.

The square root of 868219 is about 931.7826999896. The cubic root of 868219 is about 95.3988402803.

The spelling of 868219 in words is "eight hundred sixty-eight thousand, two hundred nineteen".