623505506 has 16 divisors (see below), whose sum is σ = 1016446200. Its totient is φ = 285130368.

The previous prime is 623505503. The next prime is 623505517. The reversal of 623505506 is 605505326.

It can be written as a sum of positive squares in 4 ways, for example, as 406385281 + 217120225 = 20159^2 + 14735^2 .

It is not an unprimeable number, because it can be changed into a prime (623505503) 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 in 7 ways as a sum of consecutive naturals, for example, 107171 + ... + 112838.

Almost surely, 2^623505506 is an apocalyptic number.

623505506 is a deficient number, since it is larger than the sum of its proper divisors (392940694).

623505506 is a wasteful number, since it uses less digits than its factorization.

623505506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220133.

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 623505506 is about 24970.0922305065. The cubic root of 623505506 is about 854.3059497551.

The spelling of 623505506 in words is "six hundred twenty-three million, five hundred five thousand, five hundred six".