2031987 has 6 divisors (see below), whose sum is σ = 2712612. Its totient is φ = 1353012.

The previous prime is 2031983. The next prime is 2032013. The reversal of 2031987 is 7891302.

It is a happy number.

It is not a de Polignac number, because 2031987 - 2² = 2031983 is a prime.

2031987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2031983) 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 5 ways as a sum of consecutive naturals, for example, 2058 + ... + 2880.

It is an arithmetic number, because the mean of its divisors is an integer number (452102).

2^2031987 is an apocalyptic number.

2031987 is a deficient number, since it is larger than the sum of its proper divisors (680625).

2031987 is an frugal number, since it uses more digits than its factorization.

2031987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649 (or 826 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 2031987 is about 1425.4778146292. The cubic root of 2031987 is about 126.6602405173.

The spelling of 2031987 in words is "two million, thirty-one thousand, nine hundred eighty-seven".