117886 has 4 divisors (see below), whose sum is σ = 176832. Its totient is φ = 58942.

The previous prime is 117883. The next prime is 117889. The reversal of 117886 is 688711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 688711 = 151 ⋅4561.

It is an interprime number because it is at equal distance from previous prime (117883) and next prime (117889).

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 not an unprimeable number, because it can be changed into a prime (117881) 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, 29470 + ... + 29473.

It is an arithmetic number, because the mean of its divisors is an integer number (44208).

2¹¹⁷⁸⁸⁶ is an apocalyptic number.

117886 is a deficient number, since it is larger than the sum of its proper divisors (58946).

117886 is an equidigital number, since it uses as much as digits as its factorization.

117886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58945.

The product of its digits is 2688, while the sum is 31.

The square root of 117886 is about 343.3453072346. The cubic root of 117886 is about 49.0328808878.

Subtracting from 117886 its sum of digits (31), we obtain a triangular number (117855 = T₄₈₅).

The spelling of 117886 in words is "one hundred seventeen thousand, eight hundred eighty-six".