8218943 has 4 divisors (see below), whose sum is σ = 8247288. Its totient is φ = 8190600.

The previous prime is 8218913. The next prime is 8218961. The reversal of 8218943 is 3498128.

It is a happy number.

8218943 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8218943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8218913) 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, 13733 + ... + 14318.

It is an arithmetic number, because the mean of its divisors is an integer number (2061822).

Almost surely, 2^8218943 is an apocalyptic number.

8218943 is a deficient number, since it is larger than the sum of its proper divisors (28345).

8218943 is a wasteful number, since it uses less digits than its factorization.

8218943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28344.

The product of its digits is 13824, while the sum is 35.

The square root of 8218943 is about 2866.8698958969. The cubic root of 8218943 is about 201.8081290846.

The spelling of 8218943 in words is "eight million, two hundred eighteen thousand, nine hundred forty-three".