117808709 has 4 divisors (see below), whose sum is σ = 118051104. Its totient is φ = 117566316.

The previous prime is 117808697. The next prime is 117808727. The reversal of 117808709 is 907808711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 907808711 = 2663 ⋅340897.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117808709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117808729) 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 in 3 ways as a sum of consecutive naturals, for example, 120467 + ... + 121440.

It is an arithmetic number, because the mean of its divisors is an integer number (29512776).

Almost surely, 2^117808709 is an apocalyptic number.

It is an amenable number.

117808709 is a deficient number, since it is larger than the sum of its proper divisors (242395).

117808709 is an equidigital number, since it uses as much as digits as its factorization.

117808709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242394.

The product of its (nonzero) digits is 28224, while the sum is 41.

The square root of 117808709 is about 10853.9720379223. The cubic root of 117808709 is about 490.2216254143.

The spelling of 117808709 in words is "one hundred seventeen million, eight hundred eight thousand, seven hundred nine".