520347499787 has 2 divisors, whose sum is σ = 520347499788. Its totient is φ = 520347499786.

The previous prime is 520347499783. The next prime is 520347499829. The reversal of 520347499787 is 787994743025.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520347499787 - 2² = 520347499783 is a prime.

It is not a weakly prime, because it can be changed into another prime (520347499783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260173749893 + 260173749894.

It is an arithmetic number, because the mean of its divisors is an integer number (260173749894).

Almost surely, 2^520347499787 is an apocalyptic number.

520347499787 is a deficient number, since it is larger than the sum of its proper divisors (1).

520347499787 is an equidigital number, since it uses as much as digits as its factorization.

520347499787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 106686720, while the sum is 65.

The spelling of 520347499787 in words is "five hundred twenty billion, three hundred forty-seven million, four hundred ninety-nine thousand, seven hundred eighty-seven".