117105509 has 4 divisors (see below), whose sum is σ = 121143660. Its totient is φ = 113067360.

The previous prime is 117105497. The next prime is 117105511. The reversal of 117105509 is 905501711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 905501711 = 599 ⋅1511689.

It can be written as a sum of positive squares in 2 ways, for example, as 32741284 + 84364225 = 5722^2 + 9185^2 .

It is a cyclic number.

It is not a de Polignac number, because 117105509 - 2⁸ = 117105253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 4038121 = 117105509 / (1 + 1 + 7 + 1 + 0 + 5 + 5 + 0 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117105539) 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 in 3 ways as a sum of consecutive naturals, for example, 2019032 + ... + 2019089.

It is an arithmetic number, because the mean of its divisors is an integer number (30285915).

Almost surely, 2^117105509 is an apocalyptic number.

It is an amenable number.

117105509 is a deficient number, since it is larger than the sum of its proper divisors (4038151).

117105509 is an equidigital number, since it uses as much as digits as its factorization.

117105509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038150.

The product of its (nonzero) digits is 1575, while the sum is 29.

The square root of 117105509 is about 10821.5298825998. The cubic root of 117105509 is about 489.2443009056.

The spelling of 117105509 in words is "one hundred seventeen million, one hundred five thousand, five hundred nine".