117847 has 4 divisors (see below), whose sum is σ = 118656. Its totient is φ = 117040.

The previous prime is 117841. The next prime is 117851. The reversal of 117847 is 748711.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 117847 - 2³ = 117839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118 + ... + 499.

It is an arithmetic number, because the mean of its divisors is an integer number (29664).

2¹¹⁷⁸⁴⁷ is an apocalyptic number.

117847 is a deficient number, since it is larger than the sum of its proper divisors (809).

117847 is an equidigital number, since it uses as much as digits as its factorization.

117847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808.

The product of its digits is 1568, while the sum is 28.

The square root of 117847 is about 343.2885084007. The cubic root of 117847 is about 49.0274731400.

It can be divided in two parts, 1178 and 47, that added together give a triangular number (1225 = T₄₉).

The spelling of 117847 in words is "one hundred seventeen thousand, eight hundred forty-seven".