3943749 has 8 divisors (see below), whose sum is σ = 5386752. Its totient is φ = 2564960.

The previous prime is 3943721. The next prime is 3943757. The reversal of 3943749 is 9473493.

3943749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 3943749 - 2⁵ = 3943717 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3943769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15909 + ... + 16154.

It is an arithmetic number, because the mean of its divisors is an integer number (673344).

Almost surely, 2^3943749 is an apocalyptic number.

It is an amenable number.

3943749 is a deficient number, since it is larger than the sum of its proper divisors (1443003).

3943749 is a wasteful number, since it uses less digits than its factorization.

3943749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32107.

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

The square root of 3943749 is about 1985.8874590470. The cubic root of 3943749 is about 157.9924821504.

The spelling of 3943749 in words is "three million, nine hundred forty-three thousand, seven hundred forty-nine".