8686213 has 2 divisors, whose sum is σ = 8686214. Its totient is φ = 8686212.

The previous prime is 8686207. The next prime is 8686241. The reversal of 8686213 is 3126868.

8686213 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8661249 + 24964 = 2943^2 + 158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8686213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8686273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4343106 + 4343107.

It is an arithmetic number, because the mean of its divisors is an integer number (4343107).

Almost surely, 2^8686213 is an apocalyptic number.

It is an amenable number.

8686213 is a deficient number, since it is larger than the sum of its proper divisors (1).

8686213 is an equidigital number, since it uses as much as digits as its factorization.

8686213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The square root of 8686213 is about 2947.2381987210. The cubic root of 8686213 is about 205.5623110298.

It can be divided in two parts, 868621 and 3, that added together give a square (868624 = 932²).

The spelling of 8686213 in words is "eight million, six hundred eighty-six thousand, two hundred thirteen".