86687 has 4 divisors (see below), whose sum is σ = 90480. Its totient is φ = 82896.

The previous prime is 86677. The next prime is 86689. The reversal of 86687 is 78668.

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 86687 - 2¹² = 82591 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 (86689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1862 + ... + 1907.

It is an arithmetic number, because the mean of its divisors is an integer number (22620).

2⁸⁶⁶⁸⁷ is an apocalyptic number.

86687 is a deficient number, since it is larger than the sum of its proper divisors (3793).

86687 is a wasteful number, since it uses less digits than its factorization.

86687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3792.

The product of its digits is 16128, while the sum is 35.

The square root of 86687 is about 294.4265613018. The cubic root of 86687 is about 44.2572737466.

The spelling of 86687 in words is "eighty-six thousand, six hundred eighty-seven".