1063718681 has 2 divisors, whose sum is σ = 1063718682. Its totient is φ = 1063718680.

The previous prime is 1063718573. The next prime is 1063718687. The reversal of 1063718681 is 1868173601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1031694400 + 32024281 = 32120^2 + 5659^2 .

It is a cyclic number.

It is not a de Polignac number, because 1063718681 - 2¹⁰ = 1063717657 is a prime.

It is a super-2 number, since 2×1063718681² = 2262994864616759522, which contains 22 as substring.

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 (1063718687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 531859340 + 531859341.

It is an arithmetic number, because the mean of its divisors is an integer number (531859341).

Almost surely, 2^1063718681 is an apocalyptic number.

It is an amenable number.

1063718681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1063718681 is an equidigital number, since it uses as much as digits as its factorization.

1063718681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1063718681 is about 32614.7003818830. The cubic root of 1063718681 is about 1020.8037625324.

The spelling of 1063718681 in words is "one billion, sixty-three million, seven hundred eighteen thousand, six hundred eighty-one".