520530979 has 2 divisors, whose sum is σ = 520530980. Its totient is φ = 520530978.

The previous prime is 520530961. The next prime is 520531001. The reversal of 520530979 is 979035025.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520530979 - 2⁷ = 520530851 is a prime.

It is not a weakly prime, because it can be changed into another prime (520530919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260265489 + 260265490.

It is an arithmetic number, because the mean of its divisors is an integer number (260265490).

Almost surely, 2^520530979 is an apocalyptic number.

520530979 is a deficient number, since it is larger than the sum of its proper divisors (1).

520530979 is an equidigital number, since it uses as much as digits as its factorization.

520530979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 520530979 is about 22815.1480161756. The cubic root of 520530979 is about 804.4187664215.

The spelling of 520530979 in words is "five hundred twenty million, five hundred thirty thousand, nine hundred seventy-nine".