3958694317871 has 2 divisors, whose sum is σ = 3958694317872. Its totient is φ = 3958694317870.

The previous prime is 3958694317849. The next prime is 3958694317891. The reversal of 3958694317871 is 1787134968593.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3958694317871 - 2¹⁰ = 3958694316847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3958694317795 and 3958694317804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3958694317891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1979347158935 + 1979347158936.

It is an arithmetic number, because the mean of its divisors is an integer number (1979347158936).

Almost surely, 2^{3958694317871} is an apocalyptic number.

3958694317871 is a deficient number, since it is larger than the sum of its proper divisors (1).

3958694317871 is an equidigital number, since it uses as much as digits as its factorization.

3958694317871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 274337280, while the sum is 71.

The spelling of 3958694317871 in words is "three trillion, nine hundred fifty-eight billion, six hundred ninety-four million, three hundred seventeen thousand, eight hundred seventy-one".