8640213 has 4 divisors (see below), whose sum is σ = 11520288. Its totient is φ = 5760140.

The previous prime is 8640211. The next prime is 8640221. The reversal of 8640213 is 3120468.

It is a happy number.

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 8640213 - 2¹ = 8640211 is a prime.

8640213 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1440033 + ... + 1440038.

It is an arithmetic number, because the mean of its divisors is an integer number (2880072).

Almost surely, 2^8640213 is an apocalyptic number.

It is an amenable number.

8640213 is a deficient number, since it is larger than the sum of its proper divisors (2880075).

8640213 is a wasteful number, since it uses less digits than its factorization.

8640213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2880074.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 8640213 is about 2939.4239231523. The cubic root of 8640213 is about 205.1987998136.

The spelling of 8640213 in words is "eight million, six hundred forty thousand, two hundred thirteen".