3943439 has 4 divisors (see below), whose sum is σ = 4175424. Its totient is φ = 3711456.

The previous prime is 3943427. The next prime is 3943451. The reversal of 3943439 is 9343493.

3943439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9343493 = 31 ⋅301403.

It is an interprime number because it is at equal distance from previous prime (3943427) and next prime (3943451).

It is a cyclic number.

It is not a de Polignac number, because 3943439 - 2²⁰ = 2894863 is a prime.

It is a super-2 number, since 2×3943439² = 31101422293442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3943399 and 3943408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3943409) 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 3 ways as a sum of consecutive naturals, for example, 115967 + ... + 116000.

It is an arithmetic number, because the mean of its divisors is an integer number (1043856).

Almost surely, 2^3943439 is an apocalyptic number.

3943439 is a deficient number, since it is larger than the sum of its proper divisors (231985).

3943439 is a wasteful number, since it uses less digits than its factorization.

3943439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231984.

The product of its digits is 34992, while the sum is 35.

The square root of 3943439 is about 1985.8094067659. The cubic root of 3943439 is about 157.9883423541.

The spelling of 3943439 in words is "three million, nine hundred forty-three thousand, four hundred thirty-nine".