520340773 has 2 divisors, whose sum is σ = 520340774. Its totient is φ = 520340772.

The previous prime is 520340767. The next prime is 520340813. The reversal of 520340773 is 377043025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 476025124 + 44315649 = 21818^2 + 6657^2 .

It is a cyclic number.

It is not a de Polignac number, because 520340773 - 2⁵ = 520340741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520140773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260170386 + 260170387.

It is an arithmetic number, because the mean of its divisors is an integer number (260170387).

Almost surely, 2^520340773 is an apocalyptic number.

It is an amenable number.

520340773 is a deficient number, since it is larger than the sum of its proper divisors (1).

520340773 is an equidigital number, since it uses as much as digits as its factorization.

520340773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 31.

The square root of 520340773 is about 22810.9792205420. The cubic root of 520340773 is about 804.3207742288.

Adding to 520340773 its reverse (377043025), we get a palindrome (897383798).

The spelling of 520340773 in words is "five hundred twenty million, three hundred forty thousand, seven hundred seventy-three".