520723 has 6 divisors (see below), whose sum is σ = 605796. Its totient is φ = 446292.

The previous prime is 520721. The next prime is 520747. The reversal of 520723 is 327025.

It is a happy number.

It is not a de Polignac number, because 520723 - 2¹ = 520721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 520723.

It is not an unprimeable number, because it can be changed into a prime (520721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5265 + ... + 5362.

It is an arithmetic number, because the mean of its divisors is an integer number (100966).

2⁵²⁰⁷²³ is an apocalyptic number.

520723 is a deficient number, since it is larger than the sum of its proper divisors (85073).

520723 is a wasteful number, since it uses less digits than its factorization.

520723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10641 (or 10634 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 520723 is about 721.6113912626. The cubic root of 520723 is about 80.4517669473.

Adding to 520723 its reverse (327025), we get a palindrome (847748).

The spelling of 520723 in words is "five hundred twenty thousand, seven hundred twenty-three".