3909871 has 8 divisors (see below), whose sum is σ = 4544640. Its totient is φ = 3294168.

The previous prime is 3909853. The next prime is 3909889. The reversal of 3909871 is 1789093.

It is an interprime number because it is at equal distance from previous prime (3909853) and next prime (3909889).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3909871 - 2⁹ = 3909359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3909871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4321 + ... + 5146.

It is an arithmetic number, because the mean of its divisors is an integer number (568080).

Almost surely, 2^3909871 is an apocalyptic number.

3909871 is a deficient number, since it is larger than the sum of its proper divisors (634769).

3909871 is an equidigital number, since it uses as much as digits as its factorization.

3909871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9533.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 3909871 is about 1977.3393740074. The cubic root of 3909871 is about 157.5387793987.

The spelling of 3909871 in words is "three million, nine hundred nine thousand, eight hundred seventy-one".