6687287 has 4 divisors (see below), whose sum is σ = 6702960. Its totient is φ = 6671616.

The previous prime is 6687283. The next prime is 6687293. The reversal of 6687287 is 7827866.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6687287 - 2² = 6687283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687283) 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 3 ways as a sum of consecutive naturals, for example, 7178 + ... + 8055.

It is an arithmetic number, because the mean of its divisors is an integer number (1675740).

Almost surely, 2^6687287 is an apocalyptic number.

6687287 is a deficient number, since it is larger than the sum of its proper divisors (15673).

6687287 is a wasteful number, since it uses less digits than its factorization.

6687287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15672.

The product of its digits is 225792, while the sum is 44.

The square root of 6687287 is about 2585.9789248948. The cubic root of 6687287 is about 188.4010508218.

The spelling of 6687287 in words is "six million, six hundred eighty-seven thousand, two hundred eighty-seven".