500665987 has 2 divisors, whose sum is σ = 500665988. Its totient is φ = 500665986.

The previous prime is 500665961. The next prime is 500666021. The reversal of 500665987 is 789566005.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 500665987 - 2⁷ = 500665859 is a prime.

It is not a weakly prime, because it can be changed into another prime (500665927) 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, 250332993 + 250332994.

It is an arithmetic number, because the mean of its divisors is an integer number (250332994).

Almost surely, 2^500665987 is an apocalyptic number.

500665987 is a deficient number, since it is larger than the sum of its proper divisors (1).

500665987 is an equidigital number, since it uses as much as digits as its factorization.

500665987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 500665987 is about 22375.5667414258. The cubic root of 500665987 is about 794.0527657937.

The spelling of 500665987 in words is "five hundred million, six hundred sixty-five thousand, nine hundred eighty-seven".