3994943 has 4 divisors (see below), whose sum is σ = 4039920. Its totient is φ = 3949968.

The previous prime is 3994937. The next prime is 3994961. The reversal of 3994943 is 3494993.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3994943 - 2⁸ = 3994687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3994943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3994933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22355 + ... + 22532.

It is an arithmetic number, because the mean of its divisors is an integer number (1009980).

Almost surely, 2^3994943 is an apocalyptic number.

3994943 is a deficient number, since it is larger than the sum of its proper divisors (44977).

3994943 is an equidigital number, since it uses as much as digits as its factorization.

3994943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44976.

The product of its digits is 104976, while the sum is 41.

The square root of 3994943 is about 1998.7353501652. The cubic root of 3994943 is about 158.6731812600.

The spelling of 3994943 in words is "three million, nine hundred ninety-four thousand, nine hundred forty-three".