3947243 has 4 divisors (see below), whose sum is σ = 3960168. Its totient is φ = 3934320.

The previous prime is 3947233. The next prime is 3947297. The reversal of 3947243 is 3427493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3427493 = 587 ⋅5839.

It is a cyclic number.

It is not a de Polignac number, because 3947243 - 2⁴ = 3947227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3947233) 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, 5993 + ... + 6618.

It is an arithmetic number, because the mean of its divisors is an integer number (990042).

Almost surely, 2^3947243 is an apocalyptic number.

3947243 is a deficient number, since it is larger than the sum of its proper divisors (12925).

3947243 is a wasteful number, since it uses less digits than its factorization.

3947243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12924.

The product of its digits is 18144, while the sum is 32.

The square root of 3947243 is about 1986.7669717408. The cubic root of 3947243 is about 158.0391266663.

The spelling of 3947243 in words is "three million, nine hundred forty-seven thousand, two hundred forty-three".