117982 has 4 divisors (see below), whose sum is σ = 176976. Its totient is φ = 58990.

The previous prime is 117979. The next prime is 117989. The reversal of 117982 is 289711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 289711 = 281 ⋅1031.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 117982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117989) 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 as a sum of consecutive naturals, namely, 29494 + ... + 29497.

It is an arithmetic number, because the mean of its divisors is an integer number (44244).

2¹¹⁷⁹⁸² is an apocalyptic number.

117982 is a deficient number, since it is larger than the sum of its proper divisors (58994).

117982 is an equidigital number, since it uses as much as digits as its factorization.

117982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58993.

The product of its digits is 1008, while the sum is 28.

The square root of 117982 is about 343.4850797342. The cubic root of 117982 is about 49.0461871877.

The spelling of 117982 in words is "one hundred seventeen thousand, nine hundred eighty-two".