509444087 has 2 divisors, whose sum is σ = 509444088. Its totient is φ = 509444086.

The previous prime is 509444063. The next prime is 509444129. The reversal of 509444087 is 780444905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 509444087 - 2¹⁴ = 509427703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509444027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254722043 + 254722044.

It is an arithmetic number, because the mean of its divisors is an integer number (254722044).

Almost surely, 2^509444087 is an apocalyptic number.

509444087 is a deficient number, since it is larger than the sum of its proper divisors (1).

509444087 is an equidigital number, since it uses as much as digits as its factorization.

509444087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 509444087 is about 22570.8681047052. The cubic root of 509444087 is about 798.6665740163. Note that the first 3 decimals are identical.

The spelling of 509444087 in words is "five hundred nine million, four hundred forty-four thousand, eighty-seven".