3843391 has 4 divisors (see below), whose sum is σ = 3847384. Its totient is φ = 3839400.

The previous prime is 3843379. The next prime is 3843407. The reversal of 3843391 is 1933483.

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: 1933483 = 977 ⋅1979.

It is a cyclic number.

It is not a de Polignac number, because 3843391 - 2¹³ = 3835199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3843311) 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, 436 + ... + 2806.

It is an arithmetic number, because the mean of its divisors is an integer number (961846).

Almost surely, 2^3843391 is an apocalyptic number.

3843391 is a deficient number, since it is larger than the sum of its proper divisors (3993).

3843391 is a wasteful number, since it uses less digits than its factorization.

3843391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3992.

The product of its digits is 7776, while the sum is 31.

The square root of 3843391 is about 1960.4568345159. The cubic root of 3843391 is about 156.6407869329.

The spelling of 3843391 in words is "three million, eight hundred forty-three thousand, three hundred ninety-one".