3947143 has 2 divisors, whose sum is σ = 3947144. Its totient is φ = 3947142.

The previous prime is 3947131. The next prime is 3947147. The reversal of 3947143 is 3417493.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3947143 is a prime.

3947143 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3947147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1973571 + 1973572.

It is an arithmetic number, because the mean of its divisors is an integer number (1973572).

Almost surely, 2^3947143 is an apocalyptic number.

3947143 is a deficient number, since it is larger than the sum of its proper divisors (1).

3947143 is an equidigital number, since it uses as much as digits as its factorization.

3947143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 3947143 is about 1986.7418050668. The cubic root of 3947143 is about 158.0377920600.

The spelling of 3947143 in words is "three million, nine hundred forty-seven thousand, one hundred forty-three".