117805989 has 8 divisors (see below), whose sum is σ = 179513920. Its totient is φ = 67317696.

The previous prime is 117805981. The next prime is 117805991. The reversal of 117805989 is 989508711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117805989 - 2³ = 117805981 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 (117805981) 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 7 ways as a sum of consecutive naturals, for example, 2804884 + ... + 2804925.

It is an arithmetic number, because the mean of its divisors is an integer number (22439240).

Almost surely, 2^117805989 is an apocalyptic number.

It is an amenable number.

117805989 is a deficient number, since it is larger than the sum of its proper divisors (61707931).

117805989 is an equidigital number, since it uses as much as digits as its factorization.

117805989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5609819.

The product of its (nonzero) digits is 181440, while the sum is 48.

The square root of 117805989 is about 10853.8467374475. The cubic root of 117805989 is about 490.2178525945.

The spelling of 117805989 in words is "one hundred seventeen million, eight hundred five thousand, nine hundred eighty-nine".