3871631 has 4 divisors (see below), whose sum is σ = 4099392. Its totient is φ = 3643872.

The previous prime is 3871619. The next prime is 3871657. The reversal of 3871631 is 1361783.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3871631 is a prime.

It is a super-2 number, since 2×3871631² = 29979053200322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3871594 and 3871603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871601) 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, 113855 + ... + 113888.

It is an arithmetic number, because the mean of its divisors is an integer number (1024848).

Almost surely, 2^3871631 is an apocalyptic number.

3871631 is a deficient number, since it is larger than the sum of its proper divisors (227761).

3871631 is a wasteful number, since it uses less digits than its factorization.

3871631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227760.

The product of its digits is 3024, while the sum is 29.

The square root of 3871631 is about 1967.6460555700. The cubic root of 3871631 is about 157.0234998023.

The spelling of 3871631 in words is "three million, eight hundred seventy-one thousand, six hundred thirty-one".