500081509 has 2 divisors, whose sum is σ = 500081510. Its totient is φ = 500081508.

The previous prime is 500081497. The next prime is 500081521. The reversal of 500081509 is 905180005.

It is a balanced prime because it is at equal distance from previous prime (500081497) and next prime (500081521).

It can be written as a sum of positive squares in only one way, i.e., 479741409 + 20340100 = 21903^2 + 4510^2 .

It is a cyclic number.

It is not a de Polignac number, because 500081509 - 2¹⁹ = 499557221 is a prime.

It is a super-4 number, since 4×500081509⁴ (a number of 36 digits) contains 4444 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 (500081579) 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, 250040754 + 250040755.

It is an arithmetic number, because the mean of its divisors is an integer number (250040755).

Almost surely, 2^500081509 is an apocalyptic number.

It is an amenable number.

500081509 is a deficient number, since it is larger than the sum of its proper divisors (1).

500081509 is an equidigital number, since it uses as much as digits as its factorization.

500081509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 500081509 is about 22362.5022973727. The cubic root of 500081509 is about 793.7436527982.

The spelling of 500081509 in words is "five hundred million, eighty-one thousand, five hundred nine".