623213 has 4 divisors (see below), whose sum is σ = 627900. Its totient is φ = 618528.

The previous prime is 623209. The next prime is 623221. The reversal of 623213 is 312326.

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

It can be written as a sum of positive squares in 2 ways, for example, as 413449 + 209764 = 643^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 623213 - 2² = 623209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 623191 and 623200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623263) 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, 2138 + ... + 2411.

It is an arithmetic number, because the mean of its divisors is an integer number (156975).

2⁶²³²¹³ is an apocalyptic number.

It is an amenable number.

623213 is a deficient number, since it is larger than the sum of its proper divisors (4687).

623213 is a wasteful number, since it uses less digits than its factorization.

623213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4686.

The product of its digits is 216, while the sum is 17.

The square root of 623213 is about 789.4384079838. The cubic root of 623213 is about 85.4172334948.

Adding to 623213 its reverse (312326), we get a palindrome (935539).

The spelling of 623213 in words is "six hundred twenty-three thousand, two hundred thirteen".