499766509 has 8 divisors (see below), whose sum is σ = 545873760. Its totient is φ = 453771600.

The previous prime is 499766503. The next prime is 499766537. The reversal of 499766509 is 905667994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 499766509 - 2⁷ = 499766381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 499766509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499766503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18639 + ... + 36700.

It is an arithmetic number, because the mean of its divisors is an integer number (68234220).

Almost surely, 2^499766509 is an apocalyptic number.

It is an amenable number.

499766509 is a deficient number, since it is larger than the sum of its proper divisors (46107251).

499766509 is a wasteful number, since it uses less digits than its factorization.

499766509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56171.

The product of its (nonzero) digits is 3674160, while the sum is 55.

The square root of 499766509 is about 22355.4581478439. The cubic root of 499766509 is about 793.5769587945.

The spelling of 499766509 in words is "four hundred ninety-nine million, seven hundred sixty-six thousand, five hundred nine".