499648509 has 24 divisors (see below), whose sum is σ = 743501304. Its totient is φ = 323136000.

The previous prime is 499648507. The next prime is 499648531. The reversal of 499648509 is 905846994.

499648509 is a `hidden beast` number, since 4 + 9 + 96 + 48 + 509 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 260100 + 499388409 = 510^2 + 22347^2 .

It is not a de Polignac number, because 499648509 - 2¹ = 499648507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499648507) 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 in 23 ways as a sum of consecutive naturals, for example, 63049 + ... + 70529.

It is an arithmetic number, because the mean of its divisors is an integer number (30979221).

Almost surely, 2^499648509 is an apocalyptic number.

It is an amenable number.

499648509 is a deficient number, since it is larger than the sum of its proper divisors (243852795).

499648509 is a wasteful number, since it uses less digits than its factorization.

499648509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7709 (or 7706 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The square root of 499648509 is about 22352.8188155320. The cubic root of 499648509 is about 793.5144966578.

The spelling of 499648509 in words is "four hundred ninety-nine million, six hundred forty-eight thousand, five hundred nine".