3994147 has 2 divisors, whose sum is σ = 3994148. Its totient is φ = 3994146.

The previous prime is 3994121. The next prime is 3994171. The reversal of 3994147 is 7414993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3994147 - 2¹¹ = 3992099 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3994747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1997073 + 1997074.

It is an arithmetic number, because the mean of its divisors is an integer number (1997074).

Almost surely, 2^3994147 is an apocalyptic number.

3994147 is a deficient number, since it is larger than the sum of its proper divisors (1).

3994147 is an equidigital number, since it uses as much as digits as its factorization.

3994147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 3994147 is about 1998.5362143329. The cubic root of 3994147 is about 158.6626419155.

The spelling of 3994147 in words is "three million, nine hundred ninety-four thousand, one hundred forty-seven".