499545509 has 2 divisors, whose sum is σ = 499545510. Its totient is φ = 499545508.

The previous prime is 499545481. The next prime is 499545539. The reversal of 499545509 is 905545994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285508609 + 214036900 = 16897^2 + 14630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499545509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499545539) 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, 249772754 + 249772755.

It is an arithmetic number, because the mean of its divisors is an integer number (249772755).

Almost surely, 2^499545509 is an apocalyptic number.

It is an amenable number.

499545509 is a deficient number, since it is larger than the sum of its proper divisors (1).

499545509 is an equidigital number, since it uses as much as digits as its factorization.

499545509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458000, while the sum is 50.

The square root of 499545509 is about 22350.5147368019. The cubic root of 499545509 is about 793.4599665841.

The spelling of 499545509 in words is "four hundred ninety-nine million, five hundred forty-five thousand, five hundred nine".