3965697856831 has 2 divisors, whose sum is σ = 3965697856832. Its totient is φ = 3965697856830.

The previous prime is 3965697856733. The next prime is 3965697856847. The reversal of 3965697856831 is 1386587965693.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3965697856831 - 2²¹ = 3965695759679 is a prime.

It is a super-3 number, since 3×3965697856831³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3965697856031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1982848928415 + 1982848928416.

It is an arithmetic number, because the mean of its divisors is an integer number (1982848928416).

Almost surely, 2^{3965697856831} is an apocalyptic number.

3965697856831 is a deficient number, since it is larger than the sum of its proper divisors (1).

3965697856831 is an equidigital number, since it uses as much as digits as its factorization.

3965697856831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1763596800, while the sum is 76.

The spelling of 3965697856831 in words is "three trillion, nine hundred sixty-five billion, six hundred ninety-seven million, eight hundred fifty-six thousand, eight hundred thirty-one".