520493399 has 2 divisors, whose sum is σ = 520493400. Its totient is φ = 520493398.

The previous prime is 520493387. The next prime is 520493417. The reversal of 520493399 is 993394025.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520493399 - 2⁸ = 520493143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520493329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260246699 + 260246700.

It is an arithmetic number, because the mean of its divisors is an integer number (260246700).

Almost surely, 2^520493399 is an apocalyptic number.

520493399 is a deficient number, since it is larger than the sum of its proper divisors (1).

520493399 is an equidigital number, since it uses as much as digits as its factorization.

520493399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 262440, while the sum is 44.

The square root of 520493399 is about 22814.3244256761. The cubic root of 520493399 is about 804.3994074810.

The spelling of 520493399 in words is "five hundred twenty million, four hundred ninety-three thousand, three hundred ninety-nine".