487566509 has 2 divisors, whose sum is σ = 487566510. Its totient is φ = 487566508.

The previous prime is 487566463. The next prime is 487566539. The reversal of 487566509 is 905665784.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 471845284 + 15721225 = 21722^2 + 3965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-487566509 is a prime.

It is a super-2 number, since 2×487566509² = 475442201396894162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (487566539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243783254 + 243783255.

It is an arithmetic number, because the mean of its divisors is an integer number (243783255).

Almost surely, 2^487566509 is an apocalyptic number.

It is an amenable number.

487566509 is a deficient number, since it is larger than the sum of its proper divisors (1).

487566509 is an equidigital number, since it uses as much as digits as its factorization.

487566509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The square root of 487566509 is about 22080.9082467185. The cubic root of 487566509 is about 787.0662478737.

The spelling of 487566509 in words is "four hundred eighty-seven million, five hundred sixty-six thousand, five hundred nine".