500630321 has 2 divisors, whose sum is σ = 500630322. Its totient is φ = 500630320.

The previous prime is 500630311. The next prime is 500630359. The reversal of 500630321 is 123036005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 488631025 + 11999296 = 22105^2 + 3464^2 .

It is a cyclic number.

It is not a de Polignac number, because 500630321 - 2⁶ = 500630257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 500630293 and 500630302.

It is not a weakly prime, because it can be changed into another prime (500630311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250315160 + 250315161.

It is an arithmetic number, because the mean of its divisors is an integer number (250315161).

Almost surely, 2^500630321 is an apocalyptic number.

It is an amenable number.

500630321 is a deficient number, since it is larger than the sum of its proper divisors (1).

500630321 is an equidigital number, since it uses as much as digits as its factorization.

500630321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 500630321 is about 22374.7697418320. The cubic root of 500630321 is about 794.0339100035.

Adding to 500630321 its reverse (123036005), we get a palindrome (623666326).

The spelling of 500630321 in words is "five hundred million, six hundred thirty thousand, three hundred twenty-one".