3965998943 has 2 divisors, whose sum is σ = 3965998944. Its totient is φ = 3965998942.

The previous prime is 3965998937. The next prime is 3965998961. The reversal of 3965998943 is 3498995693.

3965998943 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (3498995693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3965998943 - 2²⁸ = 3697563487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3965998943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3965998963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1982999471 + 1982999472.

It is an arithmetic number, because the mean of its divisors is an integer number (1982999472).

Almost surely, 2^3965998943 is an apocalyptic number.

3965998943 is a deficient number, since it is larger than the sum of its proper divisors (1).

3965998943 is an equidigital number, since it uses as much as digits as its factorization.

3965998943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56687040, while the sum is 65.

The square root of 3965998943 is about 62976.1775832735. The cubic root of 3965998943 is about 1582.8904712100.

The spelling of 3965998943 in words is "three billion, nine hundred sixty-five million, nine hundred ninety-eight thousand, nine hundred forty-three".