8438213 has 4 divisors (see below), whose sum is σ = 9643680. Its totient is φ = 7232748.

The previous prime is 8438207. The next prime is 8438281. The reversal of 8438213 is 3128348.

It is a happy number.

8438213 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8438213 - 2²⁰ = 7389637 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 (8438513) 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, 602723 + ... + 602736.

It is an arithmetic number, because the mean of its divisors is an integer number (2410920).

Almost surely, 2^8438213 is an apocalyptic number.

It is an amenable number.

8438213 is a deficient number, since it is larger than the sum of its proper divisors (1205467).

8438213 is a wasteful number, since it uses less digits than its factorization.

8438213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205466.

The product of its digits is 4608, while the sum is 29.

The square root of 8438213 is about 2904.8602376018. The cubic root of 8438213 is about 203.5870555416.

The spelling of 8438213 in words is "eight million, four hundred thirty-eight thousand, two hundred thirteen".