499656609 has 9 divisors (see below), whose sum is σ = 721823089. Its totient is φ = 333059700.

The previous prime is 499656601. The next prime is 499656613. The reversal of 499656609 is 906656994.

It is a happy number.

The square root of 499656609 is 22353.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 499656609 - 2³ = 499656601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499656601) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 63334 + ... + 70784.

Almost surely, 2^499656609 is an apocalyptic number.

499656609 is the 22353-rd square number.

499656609 is the 11177-th centered octagonal number.

It is an amenable number.

499656609 is a deficient number, since it is larger than the sum of its proper divisors (222166480).

499656609 is an frugal number, since it uses more digits than its factorization.

499656609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14908 (or 7454 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 54.

The cubic root of 499656609 is about 793.5187846273.

The spelling of 499656609 in words is "four hundred ninety-nine million, six hundred fifty-six thousand, six hundred nine".