3187989 has 18 divisors (see below), whose sum is σ = 5357430. Its totient is φ = 1821456.

The previous prime is 3187979. The next prime is 3188033. The reversal of 3187989 is 9897813.

It can be written as a sum of positive squares in only one way, i.e., 3186225 + 1764 = 1785^2 + 42^2 .

It is not a de Polignac number, because 3187989 - 2⁴ = 3187973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3187939) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3174 + ... + 4055.

It is an arithmetic number, because the mean of its divisors is an integer number (297635).

Almost surely, 2^3187989 is an apocalyptic number.

It is an amenable number.

3187989 is a deficient number, since it is larger than the sum of its proper divisors (2169441).

3187989 is a wasteful number, since it uses less digits than its factorization.

3187989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7249 (or 7239 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 3187989 is about 1785.4940492760. The cubic root of 3187989 is about 147.1766583627.

The spelling of 3187989 in words is "three million, one hundred eighty-seven thousand, nine hundred eighty-nine".