8618213 has 2 divisors, whose sum is σ = 8618214. Its totient is φ = 8618212.

The previous prime is 8618173. The next prime is 8618221. The reversal of 8618213 is 3128168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4464769 + 4153444 = 2113^2 + 2038^2 .

It is a cyclic number.

It is not a de Polignac number, because 8618213 - 2⁶ = 8618149 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8618243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4309106 + 4309107.

It is an arithmetic number, because the mean of its divisors is an integer number (4309107).

Almost surely, 2^8618213 is an apocalyptic number.

It is an amenable number.

8618213 is a deficient number, since it is larger than the sum of its proper divisors (1).

8618213 is an equidigital number, since it uses as much as digits as its factorization.

8618213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 29.

The square root of 8618213 is about 2935.6793080989. The cubic root of 8618213 is about 205.0244904313.

The spelling of 8618213 in words is "eight million, six hundred eighteen thousand, two hundred thirteen".