520655287 has 2 divisors, whose sum is σ = 520655288. Its totient is φ = 520655286.

The previous prime is 520655279. The next prime is 520655341. The reversal of 520655287 is 782556025.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520655287 - 2³ = 520655279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520655257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260327643 + 260327644.

It is an arithmetic number, because the mean of its divisors is an integer number (260327644).

Almost surely, 2^520655287 is an apocalyptic number.

520655287 is a deficient number, since it is larger than the sum of its proper divisors (1).

520655287 is an equidigital number, since it uses as much as digits as its factorization.

520655287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168000, while the sum is 40.

The square root of 520655287 is about 22817.8720962319. The cubic root of 520655287 is about 804.4827957385.

The spelling of 520655287 in words is "five hundred twenty million, six hundred fifty-five thousand, two hundred eighty-seven".