502705681 has 2 divisors, whose sum is σ = 502705682. Its totient is φ = 502705680.

The previous prime is 502705663. The next prime is 502705729. The reversal of 502705681 is 186507205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 272910400 + 229795281 = 16520^2 + 15159^2 .

It is a cyclic number.

It is not a de Polignac number, because 502705681 - 2¹⁵ = 502672913 is a prime.

It is a super-2 number, since 2×502705681² = 505426003419347522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (502709681) 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, 251352840 + 251352841.

It is an arithmetic number, because the mean of its divisors is an integer number (251352841).

Almost surely, 2^502705681 is an apocalyptic number.

It is an amenable number.

502705681 is a deficient number, since it is larger than the sum of its proper divisors (1).

502705681 is an equidigital number, since it uses as much as digits as its factorization.

502705681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 502705681 is about 22421.0990140983. The cubic root of 502705681 is about 795.1296182523.

The spelling of 502705681 in words is "five hundred two million, seven hundred five thousand, six hundred eighty-one".