3871789 has 4 divisors (see below), whose sum is σ = 3907420. Its totient is φ = 3836160.

The previous prime is 3871787. The next prime is 3871811. The reversal of 3871789 is 9871783.

3871789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9871783 = 857 ⋅11519.

It can be written as a sum of positive squares in 2 ways, for example, as 3034564 + 837225 = 1742^2 + 915^2 .

It is a cyclic number.

It is not a de Polignac number, because 3871789 - 2¹ = 3871787 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 (3871781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17652 + ... + 17869.

It is an arithmetic number, because the mean of its divisors is an integer number (976855).

Almost surely, 2^3871789 is an apocalyptic number.

It is an amenable number.

3871789 is a deficient number, since it is larger than the sum of its proper divisors (35631).

3871789 is a wasteful number, since it uses less digits than its factorization.

3871789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35630.

The product of its digits is 84672, while the sum is 43.

The square root of 3871789 is about 1967.6862046576. The cubic root of 3871789 is about 157.0256357992.

The spelling of 3871789 in words is "three million, eight hundred seventy-one thousand, seven hundred eighty-nine".