623343213 has 12 divisors (see below), whose sum is σ = 922345788. Its totient is φ = 405426240.

The previous prime is 623343191. The next prime is 623343221. The reversal of 623343213 is 312343326.

It is a happy number.

623343213 is a `hidden beast` number, since 6 + 2 + 334 + 321 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 34892649 + 588450564 = 5907^2 + 24258^2 .

It is not a de Polignac number, because 623343213 - 2¹² = 623339117 is a prime.

It is a super-2 number, since 2×623343213² = 777113522386326738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623343283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 844270 + ... + 845007.

It is an arithmetic number, because the mean of its divisors is an integer number (76862149).

Almost surely, 2^623343213 is an apocalyptic number.

It is an amenable number.

623343213 is a deficient number, since it is larger than the sum of its proper divisors (299002575).

623343213 is a wasteful number, since it uses less digits than its factorization.

623343213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689324 (or 1689321 counting only the distinct ones).

The product of its digits is 7776, while the sum is 27.

The square root of 623343213 is about 24966.8422713005. The cubic root of 623343213 is about 854.2318205477.

Adding to 623343213 its reverse (312343326), we get a palindrome (935686539).

The spelling of 623343213 in words is "six hundred twenty-three million, three hundred forty-three thousand, two hundred thirteen".