506239684721 has 2 divisors, whose sum is σ = 506239684722. Its totient is φ = 506239684720.

The previous prime is 506239684681. The next prime is 506239684729. The reversal of 506239684721 is 127486932605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312145690000 + 194093994721 = 558700^2 + 440561^2 .

It is a cyclic number.

It is not a de Polignac number, because 506239684721 - 2³⁴ = 489059815537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (506239684729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253119842360 + 253119842361.

It is an arithmetic number, because the mean of its divisors is an integer number (253119842361).

It is a 1-persistent number, because it is pandigital, but 2⋅506239684721 = 1012479369442 is not.

Almost surely, 2^506239684721 is an apocalyptic number.

It is an amenable number.

506239684721 is a deficient number, since it is larger than the sum of its proper divisors (1).

506239684721 is an equidigital number, since it uses as much as digits as its factorization.

506239684721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 506239684721 in words is "five hundred six billion, two hundred thirty-nine million, six hundred eighty-four thousand, seven hundred twenty-one".