623213573 has 2 divisors, whose sum is σ = 623213574. Its totient is φ = 623213572.

The previous prime is 623213473. The next prime is 623213579. The reversal of 623213573 is 375312326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 391169284 + 232044289 = 19778^2 + 15233^2 .

It is a cyclic number.

It is not a de Polignac number, because 623213573 - 2⁸ = 623213317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623213579) 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 as a sum of consecutive naturals, namely, 311606786 + 311606787.

It is an arithmetic number, because the mean of its divisors is an integer number (311606787).

Almost surely, 2^623213573 is an apocalyptic number.

It is an amenable number.

623213573 is a deficient number, since it is larger than the sum of its proper divisors (1).

623213573 is an equidigital number, since it uses as much as digits as its factorization.

623213573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 32.

The square root of 623213573 is about 24964.2458928765. The cubic root of 623213573 is about 854.1725967317.

Adding to 623213573 its reverse (375312326), we get a palindrome (998525899).

The spelling of 623213573 in words is "six hundred twenty-three million, two hundred thirteen thousand, five hundred seventy-three".