3171987 has 32 divisors (see below), whose sum is σ = 5788160. Its totient is φ = 1671840.

The previous prime is 3171977. The next prime is 3171989. The reversal of 3171987 is 7891713.

It is not a de Polignac number, because 3171987 - 2⁷ = 3171859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3171989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1812 + ... + 3102.

It is an arithmetic number, because the mean of its divisors is an integer number (180880).

Almost surely, 2^3171987 is an apocalyptic number.

3171987 is a deficient number, since it is larger than the sum of its proper divisors (2616173).

3171987 is a wasteful number, since it uses less digits than its factorization.

3171987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320 (or 1314 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 3171987 is about 1781.0072992551. The cubic root of 3171987 is about 146.9299958225.

It can be divided in two parts, 317 and 1987, that added together give a square (2304 = 48²).

The spelling of 3171987 in words is "three million, one hundred seventy-one thousand, nine hundred eighty-seven".