520023773 has 4 divisors (see below), whose sum is σ = 520634268. Its totient is φ = 519413280.

The previous prime is 520023739. The next prime is 520023793. The reversal of 520023773 is 377320025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 203290564 + 316733209 = 14258^2 + 17797^2 .

It is a cyclic number.

It is not a de Polignac number, because 520023773 - 2⁶ = 520023709 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 (520023703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303968 + ... + 305673.

It is an arithmetic number, because the mean of its divisors is an integer number (130158567).

Almost surely, 2^520023773 is an apocalyptic number.

It is an amenable number.

520023773 is a deficient number, since it is larger than the sum of its proper divisors (610495).

520023773 is an equidigital number, since it uses as much as digits as its factorization.

520023773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610494.

The product of its (nonzero) digits is 8820, while the sum is 29.

The square root of 520023773 is about 22804.0297535326. The cubic root of 520023773 is about 804.1574059815.

Adding to 520023773 its reverse (377320025), we get a palindrome (897343798).

The spelling of 520023773 in words is "five hundred twenty million, twenty-three thousand, seven hundred seventy-three".