67687 has 4 divisors (see below), whose sum is σ = 68400. Its totient is φ = 66976.

The previous prime is 67679. The next prime is 67699. The reversal of 67687 is 78676.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 67687 - 2³ = 67679 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 (67607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187 + ... + 412.

It is an arithmetic number, because the mean of its divisors is an integer number (17100).

2⁶⁷⁶⁸⁷ is an apocalyptic number.

67687 is a deficient number, since it is larger than the sum of its proper divisors (713).

67687 is a wasteful number, since it uses less digits than its factorization.

67687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712.

The product of its digits is 14112, while the sum is 34.

The square root of 67687 is about 260.1672538964. The cubic root of 67687 is about 40.7538292912.

The spelling of 67687 in words is "sixty-seven thousand, six hundred eighty-seven".