844213 has 4 divisors (see below), whose sum is σ = 848160. Its totient is φ = 840268.

The previous prime is 844201. The next prime is 844243. The reversal of 844213 is 312448.

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 844213 - 2⁹ = 843701 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1633 + ... + 2086.

It is an arithmetic number, because the mean of its divisors is an integer number (212040).

2⁸⁴⁴²¹³ is an apocalyptic number.

It is an amenable number.

844213 is a deficient number, since it is larger than the sum of its proper divisors (3947).

844213 is a wasteful number, since it uses less digits than its factorization.

844213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3946.

The product of its digits is 768, while the sum is 22.

The square root of 844213 is about 918.8106442570. The cubic root of 844213 is about 94.5113598318.

It can be divided in two parts, 8442 and 13, that multiplied together give a triangular number (109746 = T₄₆₈).

The spelling of 844213 in words is "eight hundred forty-four thousand, two hundred thirteen".