500009665 has 8 divisors (see below), whose sum is σ = 601207488. Its totient is φ = 399210480.

The previous prime is 500009663. The next prime is 500009693. The reversal of 500009665 is 566900005.

It is a happy number.

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

It is not a de Polignac number, because 500009665 - 2¹ = 500009663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (500009663) 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, 96891 + ... + 101920.

It is an arithmetic number, because the mean of its divisors is an integer number (75150936).

Almost surely, 2^500009665 is an apocalyptic number.

It is an amenable number.

500009665 is a deficient number, since it is larger than the sum of its proper divisors (101197823).

500009665 is a wasteful number, since it uses less digits than its factorization.

500009665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199319.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 500009665 is about 22360.8958899236. The cubic root of 500009665 is about 793.7056400282.

The spelling of 500009665 in words is "five hundred million, nine thousand, six hundred sixty-five".