3978071 has 2 divisors, whose sum is σ = 3978072. Its totient is φ = 3978070.

The previous prime is 3978053. The next prime is 3978101. The reversal of 3978071 is 1708793.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3978071 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3978031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989035 + 1989036.

It is an arithmetic number, because the mean of its divisors is an integer number (1989036).

Almost surely, 2^3978071 is an apocalyptic number.

3978071 is a deficient number, since it is larger than the sum of its proper divisors (1).

3978071 is an equidigital number, since it uses as much as digits as its factorization.

3978071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 3978071 is about 1994.5102155667. The cubic root of 3978071 is about 158.4494891575.

The spelling of 3978071 in words is "three million, nine hundred seventy-eight thousand, seventy-one".