117905 has 4 divisors (see below), whose sum is σ = 141492.
Its totient is φ = 94320.
The previous prime is 117899. The next prime is 117911. The reversal of 117905 is 509711.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509711 = 17 ⋅29983.
It is an interprime number because it is at equal distance from previous prime (117899) and next prime (117911).
It can be written as a sum of positive squares in 2 ways, for example, as 37249 + 80656 = 193^2 + 284^2
It is not a de Polignac number, because 117905 - 24 = 117889 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11786 + ... + 11795.
It is an arithmetic number, because the mean of its divisors is an integer number (35373).
2117905 is an apocalyptic number.
It is an amenable number.
117905 is a deficient number, since it is larger than the sum of its proper divisors (23587).
117905 is an equidigital number, since it uses as much as digits as its factorization.
117905 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 23586.
The product of its (nonzero) digits is 315, while the sum is 23.
The square root of 117905 is about 343.3729750577.
The cubic root of 117905 is about 49.0355149996.
The spelling of 117905 in words is "one hundred seventeen thousand, nine hundred five".