117813609 has 20 divisors (see below), whose sum is σ = 181674240. Its totient is φ = 76007160.

The previous prime is 117813589. The next prime is 117813611. The reversal of 117813609 is 906318711.

It is not a de Polignac number, because 117813609 - 2⁹ = 117813097 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (117815609) 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 19 ways as a sum of consecutive naturals, for example, 20949 + ... + 25970.

It is an arithmetic number, because the mean of its divisors is an integer number (9083712).

Almost surely, 2^117813609 is an apocalyptic number.

It is an amenable number.

117813609 is a deficient number, since it is larger than the sum of its proper divisors (63860631).

117813609 is an equidigital number, since it uses as much as digits as its factorization.

117813609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46962 (or 46953 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 117813609 is about 10854.1977593924. The cubic root of 117813609 is about 490.2284218916.

The spelling of 117813609 in words is "one hundred seventeen million, eight hundred thirteen thousand, six hundred nine".