87982 has 4 divisors (see below), whose sum is σ = 131976. Its totient is φ = 43990.

The previous prime is 87977. The next prime is 87991. The reversal of 87982 is 28978.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28978 = 2 ⋅14489.

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 21994 + ... + 21997.

It is an arithmetic number, because the mean of its divisors is an integer number (32994).

2⁸⁷⁹⁸² is an apocalyptic number.

87982 is a deficient number, since it is larger than the sum of its proper divisors (43994).

87982 is a wasteful number, since it uses less digits than its factorization.

87982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43993.

The product of its digits is 8064, while the sum is 34.

The square root of 87982 is about 296.6175989384. The cubic root of 87982 is about 44.4765689045.

It can be divided in two parts, 879 and 82, that added together give a square (961 = 31²).

The spelling of 87982 in words is "eighty-seven thousand, nine hundred eighty-two".