1063681681 has 2 divisors, whose sum is σ = 1063681682. Its totient is φ = 1063681680.

The previous prime is 1063681673. The next prime is 1063681711. The reversal of 1063681681 is 1861863601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 840478081 + 223203600 = 28991^2 + 14940^2 .

It is a cyclic number.

It is not a de Polignac number, because 1063681681 - 2³ = 1063681673 is a prime.

It is a super-2 number, since 2×1063681681² = 2262837436989971522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1063681181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 531840840 + 531840841.

It is an arithmetic number, because the mean of its divisors is an integer number (531840841).

Almost surely, 2^1063681681 is an apocalyptic number.

It is an amenable number.

1063681681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1063681681 is an equidigital number, since it uses as much as digits as its factorization.

1063681681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1063681681 is about 32614.1331480694. The cubic root of 1063681681 is about 1020.7919266407.

The spelling of 1063681681 in words is "one billion, sixty-three million, six hundred eighty-one thousand, six hundred eighty-one".