4039989669943 has 2 divisors, whose sum is σ = 4039989669944. Its totient is φ = 4039989669942.

The previous prime is 4039989669929. The next prime is 4039989669979. The reversal of 4039989669943 is 3499669899304.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4039989669943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4039989669923) 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, 2019994834971 + 2019994834972.

It is an arithmetic number, because the mean of its divisors is an integer number (2019994834972).

Almost surely, 2^{4039989669943} is an apocalyptic number.

4039989669943 is a deficient number, since it is larger than the sum of its proper divisors (1).

4039989669943 is an equidigital number, since it uses as much as digits as its factorization.

4039989669943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2448880128, while the sum is 79.

The spelling of 4039989669943 in words is "four trillion, thirty-nine billion, nine hundred eighty-nine million, six hundred sixty-nine thousand, nine hundred forty-three".