13982 has 4 divisors (see below), whose sum is σ = 20976. Its totient is φ = 6990.

The previous prime is 13967. The next prime is 13997. The reversal of 13982 is 28931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28931 = 7 ⋅4133.

It is an interprime number because it is at equal distance from previous prime (13967) and next prime (13997).

It is a plaindrome in base 16.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494 + ... + 3497.

It is an arithmetic number, because the mean of its divisors is an integer number (5244).

2¹³⁹⁸² is an apocalyptic number.

13982 is a deficient number, since it is larger than the sum of its proper divisors (6994).

13982 is an equidigital number, since it uses as much as digits as its factorization.

13982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6993.

The product of its digits is 432, while the sum is 23.

The square root of 13982 is about 118.2455073142. The cubic root of 13982 is about 24.0910890307.

The spelling of 13982 in words is "thirteen thousand, nine hundred eighty-two".