117391121 has 4 divisors (see below), whose sum is σ = 120563892. Its totient is φ = 114218352.

The previous prime is 117391117. The next prime is 117391129. The reversal of 117391121 is 121193711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121193711 = 227 ⋅533893.

It can be written as a sum of positive squares in 2 ways, for example, as 111534721 + 5856400 = 10561^2 + 2420^2 .

It is a cyclic number.

It is not a de Polignac number, because 117391121 - 2² = 117391117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117391129) 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, 1586330 + ... + 1586403.

It is an arithmetic number, because the mean of its divisors is an integer number (30140973).

Almost surely, 2^117391121 is an apocalyptic number.

It is an amenable number.

117391121 is a deficient number, since it is larger than the sum of its proper divisors (3172771).

117391121 is an equidigital number, since it uses as much as digits as its factorization.

117391121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172770.

The product of its digits is 378, while the sum is 26.

The square root of 117391121 is about 10834.7183165969. The cubic root of 117391121 is about 489.6417219939.

The spelling of 117391121 in words is "one hundred seventeen million, three hundred ninety-one thousand, one hundred twenty-one".