86987 has 4 divisors (see below), whose sum is σ = 89376. Its totient is φ = 84600.

The previous prime is 86981. The next prime is 86993. The reversal of 86987 is 78968.

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

It is an interprime number because it is at equal distance from previous prime (86981) and next prime (86993).

It is a cyclic number.

It is not a de Polignac number, because 86987 - 2⁶ = 86923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86987.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 86987.

It is not an unprimeable number, because it can be changed into a prime (86981) 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, 1139 + ... + 1212.

It is an arithmetic number, because the mean of its divisors is an integer number (22344).

2⁸⁶⁹⁸⁷ is an apocalyptic number.

86987 is a deficient number, since it is larger than the sum of its proper divisors (2389).

86987 is a wasteful number, since it uses less digits than its factorization.

86987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388.

The product of its digits is 24192, while the sum is 38.

The square root of 86987 is about 294.9355861879. The cubic root of 86987 is about 44.3082690718.

Adding to 86987 its sum of digits (38), we get a square (87025 = 295²).

The spelling of 86987 in words is "eighty-six thousand, nine hundred eighty-seven".