3965697856847 has 2 divisors, whose sum is σ = 3965697856848. Its totient is φ = 3965697856846.

The previous prime is 3965697856831. The next prime is 3965697856849. The reversal of 3965697856847 is 7486587965693.

3965697856847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3965697856847 - 2⁴ = 3965697856831 is a prime.

Together with 3965697856849, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3965697856849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1982848928423 + 1982848928424.

It is an arithmetic number, because the mean of its divisors is an integer number (1982848928424).

Almost surely, 2^{3965697856847} is an apocalyptic number.

3965697856847 is a deficient number, since it is larger than the sum of its proper divisors (1).

3965697856847 is an equidigital number, since it uses as much as digits as its factorization.

3965697856847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16460236800, while the sum is 83.

The spelling of 3965697856847 in words is "three trillion, nine hundred sixty-five billion, six hundred ninety-seven million, eight hundred fifty-six thousand, eight hundred forty-seven".