108987 has 8 divisors (see below), whose sum is σ = 153936. Its totient is φ = 68352.

The previous prime is 108971. The next prime is 108991. The reversal of 108987 is 789801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 108987 - 2⁴ = 108971 is a prime.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 108987.

It is not an unprimeable number, because it can be changed into a prime (108907) 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 7 ways as a sum of consecutive naturals, for example, 1018 + ... + 1119.

It is an arithmetic number, because the mean of its divisors is an integer number (19242).

2¹⁰⁸⁹⁸⁷ is an apocalyptic number.

108987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

108987 is a deficient number, since it is larger than the sum of its proper divisors (44949).

108987 is a wasteful number, since it uses less digits than its factorization.

108987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 108987 is about 330.1317918650. The cubic root of 108987 is about 47.7666626789.

It can be divided in two parts, 1089 and 87, that added together give a triangular number (1176 = T₄₈).

The spelling of 108987 in words is "one hundred eight thousand, nine hundred eighty-seven".