3978167 has 2 divisors, whose sum is σ = 3978168. Its totient is φ = 3978166.

The previous prime is 3978113. The next prime is 3978179. The reversal of 3978167 is 7618793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3978167 - 2¹² = 3974071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3978197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989083 + 1989084.

It is an arithmetic number, because the mean of its divisors is an integer number (1989084).

Almost surely, 2^3978167 is an apocalyptic number.

3978167 is a deficient number, since it is larger than the sum of its proper divisors (1).

3978167 is an equidigital number, since it uses as much as digits as its factorization.

3978167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 41.

The square root of 3978167 is about 1994.5342814803. The cubic root of 3978167 is about 158.4507637308.

The spelling of 3978167 in words is "three million, nine hundred seventy-eight thousand, one hundred sixty-seven".