117998 has 8 divisors (see below), whose sum is σ = 181440. Its totient is φ = 57520.

The previous prime is 117991. The next prime is 118033. The reversal of 117998 is 899711.

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

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117991) by changing a digit.

117998 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 in 3 ways as a sum of consecutive naturals, for example, 638 + ... + 801.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2¹¹⁷⁹⁹⁸ is an apocalyptic number.

117998 is a deficient number, since it is larger than the sum of its proper divisors (63442).

117998 is a wasteful number, since it uses less digits than its factorization.

117998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482.

The product of its digits is 4536, while the sum is 35.

The square root of 117998 is about 343.5083696215. The cubic root of 117998 is about 49.0484042025.

It can be divided in two parts, 11 and 7998, that multiplied together give a palindrome (87978).

The spelling of 117998 in words is "one hundred seventeen thousand, nine hundred ninety-eight".