6537987 has 12 divisors (see below), whose sum is σ = 9467640. Its totient is φ = 4347648.

The previous prime is 6537977. The next prime is 6537989. The reversal of 6537987 is 7897356.

It is a happy number.

It is not a de Polignac number, because 6537987 - 2⁷ = 6537859 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (6537989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4564 + ... + 5822.

It is an arithmetic number, because the mean of its divisors is an integer number (788970).

Almost surely, 2^6537987 is an apocalyptic number.

6537987 is a deficient number, since it is larger than the sum of its proper divisors (2929653).

6537987 is a wasteful number, since it uses less digits than its factorization.

6537987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842 (or 1839 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 6537987 is about 2556.9487675744. The cubic root of 6537987 is about 186.9884080626.

The spelling of 6537987 in words is "six million, five hundred thirty-seven thousand, nine hundred eighty-seven".