3947943 has 8 divisors (see below), whose sum is σ = 5433856. Its totient is φ = 2547000.

The previous prime is 3947941. The next prime is 3947963. The reversal of 3947943 is 3497493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3947943 - 2¹ = 3947941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21133 + ... + 21318.

It is an arithmetic number, because the mean of its divisors is an integer number (679232).

Almost surely, 2^3947943 is an apocalyptic number.

3947943 is a deficient number, since it is larger than the sum of its proper divisors (1485913).

3947943 is a wasteful number, since it uses less digits than its factorization.

3947943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42485.

The product of its digits is 81648, while the sum is 39.

The square root of 3947943 is about 1986.9431295334. The cubic root of 3947943 is about 158.0484682794.

The spelling of 3947943 in words is "three million, nine hundred forty-seven thousand, nine hundred forty-three".