499908609 has 12 divisors (see below), whose sum is σ = 729535716. Its totient is φ = 329836032.

The previous prime is 499908589. The next prime is 499908623. The reversal of 499908609 is 906809994.

It is a happy number.

499908609 is a `hidden beast` number, since 499 + 90 + 8 + 60 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 307476225 + 192432384 = 17535^2 + 13872^2 .

It is not a de Polignac number, because 499908609 - 2²⁴ = 483131393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (499908109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285444 + ... + 287189.

It is an arithmetic number, because the mean of its divisors is an integer number (60794643).

It is a Proth number, since it is equal to 1907 ⋅ 2¹⁸ + 1 and 1907 < 2¹⁸.

Almost surely, 2^499908609 is an apocalyptic number.

It is an amenable number.

499908609 is a deficient number, since it is larger than the sum of its proper divisors (229627107).

499908609 is a wasteful number, since it uses less digits than its factorization.

499908609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572736 (or 572733 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The square root of 499908609 is about 22358.6361167223. The cubic root of 499908609 is about 793.6521649810.

The spelling of 499908609 in words is "four hundred ninety-nine million, nine hundred eight thousand, six hundred nine".