3996943 has 4 divisors (see below), whose sum is σ = 4001200. Its totient is φ = 3992688.

The previous prime is 3996931. The next prime is 3996959. The reversal of 3996943 is 3496993.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3496993 = 53 ⋅65981.

It is a cyclic number.

It is not a de Polignac number, because 3996943 - 2⁵ = 3996911 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 3996943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3996743) 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, 30 + ... + 2827.

It is an arithmetic number, because the mean of its divisors is an integer number (1000300).

Almost surely, 2^3996943 is an apocalyptic number.

3996943 is a deficient number, since it is larger than the sum of its proper divisors (4257).

3996943 is a wasteful number, since it uses less digits than its factorization.

3996943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256.

The product of its digits is 157464, while the sum is 43.

The square root of 3996943 is about 1999.2356039247. The cubic root of 3996943 is about 158.6996558488.

The spelling of 3996943 in words is "three million, nine hundred ninety-six thousand, nine hundred forty-three".