3871993 has 16 divisors (see below), whose sum is σ = 4262400. Its totient is φ = 3507840.

The previous prime is 3871969. The next prime is 3872017. The reversal of 3871993 is 3991783.

It is an interprime number because it is at equal distance from previous prime (3871969) and next prime (3872017).

It is not a de Polignac number, because 3871993 - 2⁵ = 3871961 is a prime.

It is a Duffinian number.

3871993 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878993) 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 15 ways as a sum of consecutive naturals, for example, 53005 + ... + 53077.

It is an arithmetic number, because the mean of its divisors is an integer number (266400).

Almost surely, 2^3871993 is an apocalyptic number.

It is an amenable number.

3871993 is a deficient number, since it is larger than the sum of its proper divisors (390407).

3871993 is a wasteful number, since it uses less digits than its factorization.

3871993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192.

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

The square root of 3871993 is about 1967.7380415086. The cubic root of 3871993 is about 157.0283935827.

The spelling of 3871993 in words is "three million, eight hundred seventy-one thousand, nine hundred ninety-three".