509887061 has 2 divisors, whose sum is σ = 509887062. Its totient is φ = 509887060.

The previous prime is 509887031. The next prime is 509887073. The reversal of 509887061 is 160788905.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299463025 + 210424036 = 17305^2 + 14506^2 .

It is a cyclic number.

It is not a de Polignac number, because 509887061 - 2¹⁰ = 509886037 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509887031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254943530 + 254943531.

It is an arithmetic number, because the mean of its divisors is an integer number (254943531).

Almost surely, 2^509887061 is an apocalyptic number.

It is an amenable number.

509887061 is a deficient number, since it is larger than the sum of its proper divisors (1).

509887061 is an equidigital number, since it uses as much as digits as its factorization.

509887061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 509887061 is about 22580.6789313342. The cubic root of 509887061 is about 798.8979936119.

The spelling of 509887061 in words is "five hundred nine million, eight hundred eighty-seven thousand, sixty-one".