3993871 has 4 divisors (see below), whose sum is σ = 4564432. Its totient is φ = 3423312.

The previous prime is 3993859. The next prime is 3993889. The reversal of 3993871 is 1783993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3993871 - 2⁵ = 3993839 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 (3993071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285270 + ... + 285283.

It is an arithmetic number, because the mean of its divisors is an integer number (1141108).

Almost surely, 2^3993871 is an apocalyptic number.

3993871 is a deficient number, since it is larger than the sum of its proper divisors (570561).

3993871 is an equidigital number, since it uses as much as digits as its factorization.

3993871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570560.

The product of its digits is 40824, while the sum is 40.

The square root of 3993871 is about 1998.4671626024. The cubic root of 3993871 is about 158.6589872430.

The spelling of 3993871 in words is "three million, nine hundred ninety-three thousand, eight hundred seventy-one".