499016509 has 2 divisors, whose sum is σ = 499016510. Its totient is φ = 499016508.

The previous prime is 499016491. The next prime is 499016537. The reversal of 499016509 is 905610994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 403407225 + 95609284 = 20085^2 + 9778^2 .

It is a cyclic number.

It is not a de Polignac number, because 499016509 - 2⁷ = 499016381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499016569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249508254 + 249508255.

It is an arithmetic number, because the mean of its divisors is an integer number (249508255).

Almost surely, 2^499016509 is an apocalyptic number.

It is an amenable number.

499016509 is a deficient number, since it is larger than the sum of its proper divisors (1).

499016509 is an equidigital number, since it uses as much as digits as its factorization.

499016509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 499016509 is about 22338.6774228019. The cubic root of 499016509 is about 793.1797861901.

The spelling of 499016509 in words is "four hundred ninety-nine million, sixteen thousand, five hundred nine".