3978243343 has 2 divisors, whose sum is σ = 3978243344. Its totient is φ = 3978243342.

The previous prime is 3978243331. The next prime is 3978243391. The reversal of 3978243343 is 3433428793.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3978243343 is a prime.

It is a super-2 number, since 2×3978243343² = 31652840192247631298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3978243293 and 3978243302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3978244343) 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, 1989121671 + 1989121672.

It is an arithmetic number, because the mean of its divisors is an integer number (1989121672).

Almost surely, 2^3978243343 is an apocalyptic number.

3978243343 is a deficient number, since it is larger than the sum of its proper divisors (1).

3978243343 is an equidigital number, since it uses as much as digits as its factorization.

3978243343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 46.

The square root of 3978243343 is about 63073.3172030772. The cubic root of 3978243343 is about 1584.5177730725.

The spelling of 3978243343 in words is "three billion, nine hundred seventy-eight million, two hundred forty-three thousand, three hundred forty-three".