138982 has 4 divisors (see below), whose sum is σ = 208476. Its totient is φ = 69490.

The previous prime is 138977. The next prime is 139021. The reversal of 138982 is 289831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 289831 = 109 ⋅2659.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

138982 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34744 + ... + 34747.

It is an arithmetic number, because the mean of its divisors is an integer number (52119).

2¹³⁸⁹⁸² is an apocalyptic number.

138982 is a deficient number, since it is larger than the sum of its proper divisors (69494).

138982 is an equidigital number, since it uses as much as digits as its factorization.

138982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69493.

The product of its digits is 3456, while the sum is 31.

The square root of 138982 is about 372.8028969845. The cubic root of 138982 is about 51.7987785623.

It can be divided in two parts, 1 and 38982, that added together give a palindrome (38983).

The spelling of 138982 in words is "one hundred thirty-eight thousand, nine hundred eighty-two".