3943424993 has 2 divisors, whose sum is σ = 3943424994. Its totient is φ = 3943424992.

The previous prime is 3943424981. The next prime is 3943425007. The reversal of 3943424993 is 3994243493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3260752609 + 682672384 = 57103^2 + 26128^2 .

It is a cyclic number.

It is not a de Polignac number, because 3943424993 - 2³⁰ = 2869683169 is a prime.

It is not a weakly prime, because it can be changed into another prime (3943424923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1971712496 + 1971712497.

It is an arithmetic number, because the mean of its divisors is an integer number (1971712497).

Almost surely, 2^3943424993 is an apocalyptic number.

It is an amenable number.

3943424993 is a deficient number, since it is larger than the sum of its proper divisors (1).

3943424993 is an equidigital number, since it uses as much as digits as its factorization.

3943424993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 50.

The square root of 3943424993 is about 62796.6957172111. The cubic root of 3943424993 is about 1579.8815529697.

The spelling of 3943424993 in words is "three billion, nine hundred forty-three million, four hundred twenty-four thousand, nine hundred ninety-three".