506932721 has 2 divisors, whose sum is σ = 506932722. Its totient is φ = 506932720.

The previous prime is 506932669. The next prime is 506932759. The reversal of 506932721 is 127239605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380055025 + 126877696 = 19495^2 + 11264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-506932721 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 (506932781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253466360 + 253466361.

It is an arithmetic number, because the mean of its divisors is an integer number (253466361).

Almost surely, 2^506932721 is an apocalyptic number.

It is an amenable number.

506932721 is a deficient number, since it is larger than the sum of its proper divisors (1).

506932721 is an equidigital number, since it uses as much as digits as its factorization.

506932721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 506932721 is about 22515.1664661845. The cubic root of 506932721 is about 797.3520372241.

The spelling of 506932721 in words is "five hundred six million, nine hundred thirty-two thousand, seven hundred twenty-one".