673213 has 4 divisors (see below), whose sum is σ = 681408. Its totient is φ = 665020.

The previous prime is 673207. The next prime is 673223. The reversal of 673213 is 312376.

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 673213 - 2¹⁷ = 542141 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 (673223) 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, 3973 + ... + 4138.

It is an arithmetic number, because the mean of its divisors is an integer number (170352).

2⁶⁷³²¹³ is an apocalyptic number.

It is an amenable number.

673213 is a deficient number, since it is larger than the sum of its proper divisors (8195).

673213 is an equidigital number, since it uses as much as digits as its factorization.

673213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8194.

The product of its digits is 756, while the sum is 22.

The square root of 673213 is about 820.4955819503. The cubic root of 673213 is about 87.6430530710.

Adding to 673213 its reverse (312376), we get a palindrome (985589).

The spelling of 673213 in words is "six hundred seventy-three thousand, two hundred thirteen".