117346181 has 2 divisors, whose sum is σ = 117346182. Its totient is φ = 117346180.

The previous prime is 117346171. The next prime is 117346199. The reversal of 117346181 is 181643711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113081956 + 4264225 = 10634^2 + 2065^2 .

It is an emirp because it is prime and its reverse (181643711) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117346181 is a prime.

It is a super-2 number, since 2×117346181² = 27540252390569522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117346111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58673090 + 58673091.

It is an arithmetic number, because the mean of its divisors is an integer number (58673091).

Almost surely, 2^117346181 is an apocalyptic number.

It is an amenable number.

117346181 is a deficient number, since it is larger than the sum of its proper divisors (1).

117346181 is an equidigital number, since it uses as much as digits as its factorization.

117346181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 32.

The square root of 117346181 is about 10832.6442293652. The cubic root of 117346181 is about 489.5792320107.

Adding to 117346181 its reverse (181643711), we get a palindrome (298989892).

The spelling of 117346181 in words is "one hundred seventeen million, three hundred forty-six thousand, one hundred eighty-one".