520521977 has 2 divisors, whose sum is σ = 520521978. Its totient is φ = 520521976.

The previous prime is 520521959. The next prime is 520522007. The reversal of 520521977 is 779125025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 503374096 + 17147881 = 22436^2 + 4141^2 .

It is a cyclic number.

It is not a de Polignac number, because 520521977 - 2⁶ = 520521913 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520521977.

It is not a weakly prime, because it can be changed into another prime (520521077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260260988 + 260260989.

It is an arithmetic number, because the mean of its divisors is an integer number (260260989).

Almost surely, 2^520521977 is an apocalyptic number.

It is an amenable number.

520521977 is a deficient number, since it is larger than the sum of its proper divisors (1).

520521977 is an equidigital number, since it uses as much as digits as its factorization.

520521977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 520521977 is about 22814.9507341129. The cubic root of 520521977 is about 804.4141292211.

The spelling of 520521977 in words is "five hundred twenty million, five hundred twenty-one thousand, nine hundred seventy-seven".