117724109 has 2 divisors, whose sum is σ = 117724110. Its totient is φ = 117724108.

The previous prime is 117724093. The next prime is 117724111. The reversal of 117724109 is 901427711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91489225 + 26234884 = 9565^2 + 5122^2 .

It is a cyclic number.

It is not a de Polignac number, because 117724109 - 2⁴ = 117724093 is a prime.

It is a Sophie Germain prime.

Together with 117724111, it forms a pair of twin primes.

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 (117724199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58862054 + 58862055.

It is an arithmetic number, because the mean of its divisors is an integer number (58862055).

Almost surely, 2^117724109 is an apocalyptic number.

It is an amenable number.

117724109 is a deficient number, since it is larger than the sum of its proper divisors (1).

117724109 is an equidigital number, since it uses as much as digits as its factorization.

117724109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 117724109 is about 10850.0741472121. The cubic root of 117724109 is about 490.1042524255.

The spelling of 117724109 in words is "one hundred seventeen million, seven hundred twenty-four thousand, one hundred nine".