3936358681 has 2 divisors, whose sum is σ = 3936358682. Its totient is φ = 3936358680.

The previous prime is 3936358669. The next prime is 3936358757. The reversal of 3936358681 is 1868536393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3403672281 + 532686400 = 58341^2 + 23080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3936358681 is a prime.

It is a super-2 number, since 2×3936358681² = 30989839330968119522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3936358651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1968179340 + 1968179341.

It is an arithmetic number, because the mean of its divisors is an integer number (1968179341).

Almost surely, 2^3936358681 is an apocalyptic number.

It is an amenable number.

3936358681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3936358681 is an equidigital number, since it uses as much as digits as its factorization.

3936358681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 52.

The square root of 3936358681 is about 62740.4070834737. The cubic root of 3936358681 is about 1578.9373136393.

The spelling of 3936358681 in words is "three billion, nine hundred thirty-six million, three hundred fifty-eight thousand, six hundred eighty-one".