117913 has 4 divisors (see below), whose sum is σ = 119908. Its totient is φ = 115920.

The previous prime is 117911. The next prime is 117917. The reversal of 117913 is 319711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 319711 = 7 ⋅45673.

It can be written as a sum of positive squares in 2 ways, for example, as 34969 + 82944 = 187^2 + 288^2 .

It is a cyclic number.

It is not a de Polignac number, because 117913 - 2¹ = 117911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117911) 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, 906 + ... + 1027.

It is an arithmetic number, because the mean of its divisors is an integer number (29977).

2¹¹⁷⁹¹³ is an apocalyptic number.

It is an amenable number.

117913 is a deficient number, since it is larger than the sum of its proper divisors (1995).

117913 is an equidigital number, since it uses as much as digits as its factorization.

117913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994.

The product of its digits is 189, while the sum is 22.

The square root of 117913 is about 343.3846240006. The cubic root of 117913 is about 49.0366240146.

The spelling of 117913 in words is "one hundred seventeen thousand, nine hundred thirteen".