3978422827 has 2 divisors, whose sum is σ = 3978422828. Its totient is φ = 3978422826.

The previous prime is 3978422783. The next prime is 3978422831. The reversal of 3978422827 is 7282248793.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3978422827 is a prime.

It is not a weakly prime, because it can be changed into another prime (3978422837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989211413 + 1989211414.

It is an arithmetic number, because the mean of its divisors is an integer number (1989211414).

Almost surely, 2^3978422827 is an apocalyptic number.

3978422827 is a deficient number, since it is larger than the sum of its proper divisors (1).

3978422827 is an equidigital number, since it uses as much as digits as its factorization.

3978422827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2709504, while the sum is 52.

The square root of 3978422827 is about 63074.7400073912. The cubic root of 3978422827 is about 1584.5416019576.

The spelling of 3978422827 in words is "three billion, nine hundred seventy-eight million, four hundred twenty-two thousand, eight hundred twenty-seven".