520663823 has 8 divisors (see below), whose sum is σ = 536845056. Its totient is φ = 504667800.

The previous prime is 520663763. The next prime is 520663921. The reversal of 520663823 is 328366025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520663823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520668823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40583 + ... + 51848.

It is an arithmetic number, because the mean of its divisors is an integer number (67105632).

Almost surely, 2^520663823 is an apocalyptic number.

520663823 is a deficient number, since it is larger than the sum of its proper divisors (16181233).

520663823 is a wasteful number, since it uses less digits than its factorization.

520663823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92605.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 520663823 is about 22818.0591418289. The cubic root of 520663823 is about 804.4871921390.

The spelling of 520663823 in words is "five hundred twenty million, six hundred sixty-three thousand, eight hundred twenty-three".