3978729343 has 2 divisors, whose sum is σ = 3978729344. Its totient is φ = 3978729342.

The previous prime is 3978729289. The next prime is 3978729361. The reversal of 3978729343 is 3439278793.

It is a strong prime.

It is an emirp because it is prime and its reverse (3439278793) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3978729343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3978729373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989364671 + 1989364672.

It is an arithmetic number, because the mean of its divisors is an integer number (1989364672).

Almost surely, 2^3978729343 is an apocalyptic number.

3978729343 is a deficient number, since it is larger than the sum of its proper divisors (1).

3978729343 is an equidigital number, since it uses as much as digits as its factorization.

3978729343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6858432, while the sum is 55.

The square root of 3978729343 is about 63077.1697446865. The cubic root of 3978729343 is about 1584.5822943712.

The spelling of 3978729343 in words is "three billion, nine hundred seventy-eight million, seven hundred twenty-nine thousand, three hundred forty-three".