520043977 has 2 divisors, whose sum is σ = 520043978. Its totient is φ = 520043976.

The previous prime is 520043969. The next prime is 520043983. The reversal of 520043977 is 779340025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499030921 + 21013056 = 22339^2 + 4584^2 .

It is a cyclic number.

It is not a de Polignac number, because 520043977 - 2³ = 520043969 is a prime.

It is not a weakly prime, because it can be changed into another prime (520043987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260021988 + 260021989.

It is an arithmetic number, because the mean of its divisors is an integer number (260021989).

Almost surely, 2^520043977 is an apocalyptic number.

It is an amenable number.

520043977 is a deficient number, since it is larger than the sum of its proper divisors (1).

520043977 is an equidigital number, since it uses as much as digits as its factorization.

520043977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 520043977 is about 22804.4727411094. The cubic root of 520043977 is about 804.1678202399.

The spelling of 520043977 in words is "five hundred twenty million, forty-three thousand, nine hundred seventy-seven".