506864621 has 2 divisors, whose sum is σ = 506864622. Its totient is φ = 506864620.

The previous prime is 506864573. The next prime is 506864627. The reversal of 506864621 is 126468605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 503104900 + 3759721 = 22430^2 + 1939^2 .

It is a cyclic number.

It is not a de Polignac number, because 506864621 - 2¹⁰ = 506863597 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506864627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253432310 + 253432311.

It is an arithmetic number, because the mean of its divisors is an integer number (253432311).

Almost surely, 2^506864621 is an apocalyptic number.

It is an amenable number.

506864621 is a deficient number, since it is larger than the sum of its proper divisors (1).

506864621 is an equidigital number, since it uses as much as digits as its factorization.

506864621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 506864621 is about 22513.6541014559. The cubic root of 506864621 is about 797.3163309044.

The spelling of 506864621 in words is "five hundred six million, eight hundred sixty-four thousand, six hundred twenty-one".