499559309 has 2 divisors, whose sum is σ = 499559310. Its totient is φ = 499559308.

The previous prime is 499559257. The next prime is 499559329. The reversal of 499559309 is 903955994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 369485284 + 130074025 = 19222^2 + 11405^2 .

It is a cyclic number.

It is not a de Polignac number, because 499559309 - 2¹² = 499555213 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 (499559329) 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, 249779654 + 249779655.

It is an arithmetic number, because the mean of its divisors is an integer number (249779655).

Almost surely, 2^499559309 is an apocalyptic number.

It is an amenable number.

499559309 is a deficient number, since it is larger than the sum of its proper divisors (1).

499559309 is an equidigital number, since it uses as much as digits as its factorization.

499559309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1968300, while the sum is 53.

The square root of 499559309 is about 22350.8234523921. The cubic root of 499559309 is about 793.4672729900.

The spelling of 499559309 in words is "four hundred ninety-nine million, five hundred fifty-nine thousand, three hundred nine".