520280587 has 2 divisors, whose sum is σ = 520280588. Its totient is φ = 520280586.

The previous prime is 520280557. The next prime is 520280599. The reversal of 520280587 is 785082025.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520280587 is a prime.

It is not a weakly prime, because it can be changed into another prime (520280557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260140293 + 260140294.

It is an arithmetic number, because the mean of its divisors is an integer number (260140294).

Almost surely, 2^520280587 is an apocalyptic number.

520280587 is a deficient number, since it is larger than the sum of its proper divisors (1).

520280587 is an equidigital number, since it uses as much as digits as its factorization.

520280587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 520280587 is about 22809.6599492408. The cubic root of 520280587 is about 804.2897620414.

The spelling of 520280587 in words is "five hundred twenty million, two hundred eighty thousand, five hundred eighty-seven".