3871709 has 4 divisors (see below), whose sum is σ = 3876000. Its totient is φ = 3867420.

The previous prime is 3871691. The next prime is 3871759. The reversal of 3871709 is 9071783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3871709 - 2²⁰ = 2823133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871759) 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, 209 + ... + 2790.

It is an arithmetic number, because the mean of its divisors is an integer number (969000).

Almost surely, 2^3871709 is an apocalyptic number.

It is an amenable number.

3871709 is a deficient number, since it is larger than the sum of its proper divisors (4291).

3871709 is a wasteful number, since it uses less digits than its factorization.

3871709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 3871709 is about 1967.6658761080. The cubic root of 3871709 is about 157.0245542891.

The spelling of 3871709 in words is "three million, eight hundred seventy-one thousand, seven hundred nine".