3943437 has 4 divisors (see below), whose sum is σ = 5257920. Its totient is φ = 2628956.

The previous prime is 3943427. The next prime is 3943451. The reversal of 3943437 is 7343493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7343493 = 3 ⋅2447831.

It is a cyclic number.

It is not a de Polignac number, because 3943437 - 2¹⁰ = 3942413 is a prime.

It is a D-number.

3943437 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3943398 and 3943407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3943427) 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, 657237 + ... + 657242.

It is an arithmetic number, because the mean of its divisors is an integer number (1314480).

Almost surely, 2^3943437 is an apocalyptic number.

It is an amenable number.

3943437 is a deficient number, since it is larger than the sum of its proper divisors (1314483).

3943437 is a wasteful number, since it uses less digits than its factorization.

3943437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314482.

The product of its digits is 27216, while the sum is 33.

The square root of 3943437 is about 1985.8089031929. The cubic root of 3943437 is about 157.9883156451.

The spelling of 3943437 in words is "three million, nine hundred forty-three thousand, four hundred thirty-seven".