500668421 has 8 divisors (see below), whose sum is σ = 554336544. Its totient is φ = 448359120.

The previous prime is 500668391. The next prime is 500668429. The reversal of 500668421 is 124866005.

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

It is a de Polignac number, because none of the positive numbers 2^k-500668421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500668429) 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, 338930 + ... + 340403.

It is an arithmetic number, because the mean of its divisors is an integer number (69292068).

Almost surely, 2^500668421 is an apocalyptic number.

It is an amenable number.

500668421 is a deficient number, since it is larger than the sum of its proper divisors (53668123).

500668421 is a wasteful number, since it uses less digits than its factorization.

500668421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679411.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 500668421 is about 22375.6211310435. The cubic root of 500668421 is about 794.0540525607.

The spelling of 500668421 in words is "five hundred million, six hundred sixty-eight thousand, four hundred twenty-one".