868211 has 2 divisors, whose sum is σ = 868212. Its totient is φ = 868210.

The previous prime is 868199. The next prime is 868229. The reversal of 868211 is 112868.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868211 is a prime.

It is a plaindrome in base 15.

It is a nialpdrome in base 11.

It is not a weakly prime, because it can be changed into another prime (868271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434105 + 434106.

It is an arithmetic number, because the mean of its divisors is an integer number (434106).

2⁸⁶⁸²¹¹ is an apocalyptic number.

868211 is a deficient number, since it is larger than the sum of its proper divisors (1).

868211 is an equidigital number, since it uses as much as digits as its factorization.

868211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 26.

The square root of 868211 is about 931.7784071334. The cubic root of 868211 is about 95.3985472693.

The spelling of 868211 in words is "eight hundred sixty-eight thousand, two hundred eleven".