520493387 has 2 divisors, whose sum is σ = 520493388. Its totient is φ = 520493386.

The previous prime is 520493329. The next prime is 520493399. The reversal of 520493387 is 783394025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520493387 - 2¹⁴ = 520477003 is a prime.

It is not a weakly prime, because it can be changed into another prime (520493327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260246693 + 260246694.

It is an arithmetic number, because the mean of its divisors is an integer number (260246694).

Almost surely, 2^520493387 is an apocalyptic number.

520493387 is a deficient number, since it is larger than the sum of its proper divisors (1).

520493387 is an equidigital number, since it uses as much as digits as its factorization.

520493387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 520493387 is about 22814.3241626834. The cubic root of 520493387 is about 804.3994012992.

The spelling of 520493387 in words is "five hundred twenty million, four hundred ninety-three thousand, three hundred eighty-seven".