3978422843 has 2 divisors, whose sum is σ = 3978422844. Its totient is φ = 3978422842.

The previous prime is 3978422837. The next prime is 3978422869. The reversal of 3978422843 is 3482248793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3978422843 - 2⁴ = 3978422827 is a prime.

It is a super-3 number, since 3×3978422843³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3978422791 and 3978422800.

It is not a weakly prime, because it can be changed into another prime (3978422143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989211421 + 1989211422.

It is an arithmetic number, because the mean of its divisors is an integer number (1989211422).

Almost surely, 2^3978422843 is an apocalyptic number.

3978422843 is a deficient number, since it is larger than the sum of its proper divisors (1).

3978422843 is an equidigital number, since it uses as much as digits as its factorization.

3978422843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2322432, while the sum is 50.

The square root of 3978422843 is about 63074.7401342249. The cubic root of 3978422843 is about 1584.5416040818.

The spelling of 3978422843 in words is "three billion, nine hundred seventy-eight million, four hundred twenty-two thousand, eight hundred forty-three".