3843997 has 4 divisors (see below), whose sum is σ = 3848380. Its totient is φ = 3839616.

The previous prime is 3843977. The next prime is 3844019. The reversal of 3843997 is 7993483.

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: 7993483 = 41 ⋅194963.

It can be written as a sum of positive squares in 2 ways, for example, as 1490841 + 2353156 = 1221^2 + 1534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3843997 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 (3843937) 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, 372 + ... + 2797.

It is an arithmetic number, because the mean of its divisors is an integer number (962095).

Almost surely, 2^3843997 is an apocalyptic number.

It is an amenable number.

3843997 is a deficient number, since it is larger than the sum of its proper divisors (4383).

3843997 is a wasteful number, since it uses less digits than its factorization.

3843997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4382.

The product of its digits is 163296, while the sum is 43.

The square root of 3843997 is about 1960.6113842371. The cubic root of 3843997 is about 156.6490191882.

The spelling of 3843997 in words is "three million, eight hundred forty-three thousand, nine hundred ninety-seven".