3895706681 has 2 divisors, whose sum is σ = 3895706682. Its totient is φ = 3895706680.

The previous prime is 3895706663. The next prime is 3895706687. The reversal of 3895706681 is 1866075983.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3752665081 + 143041600 = 61259^2 + 11960^2 .

It is an emirp because it is prime and its reverse (1866075983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3895706681 - 2¹⁸ = 3895444537 is a prime.

It is a super-2 number, since 2×3895706681² = 30353061088776071522, 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 (3895706687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1947853340 + 1947853341.

It is an arithmetic number, because the mean of its divisors is an integer number (1947853341).

Almost surely, 2^3895706681 is an apocalyptic number.

It is an amenable number.

3895706681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3895706681 is an equidigital number, since it uses as much as digits as its factorization.

3895706681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 3895706681 is about 62415.5964563345. The cubic root of 3895706681 is about 1573.4831023589.

The spelling of 3895706681 in words is "three billion, eight hundred ninety-five million, seven hundred six thousand, six hundred eighty-one".