520012008391 has 2 divisors, whose sum is σ = 520012008392. Its totient is φ = 520012008390.

The previous prime is 520012008359. The next prime is 520012008409. The reversal of 520012008391 is 193800210025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520012008391 - 2⁵ = 520012008359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520012038391) 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, 260006004195 + 260006004196.

It is an arithmetic number, because the mean of its divisors is an integer number (260006004196).

Almost surely, 2^520012008391 is an apocalyptic number.

520012008391 is a deficient number, since it is larger than the sum of its proper divisors (1).

520012008391 is an equidigital number, since it uses as much as digits as its factorization.

520012008391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 520012008391 in words is "five hundred twenty billion, twelve million, eight thousand, three hundred ninety-one".