117818109 has 12 divisors (see below), whose sum is σ = 180192636. Its totient is φ = 73924992.

The previous prime is 117818089. The next prime is 117818117. The reversal of 117818109 is 901818711.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31606884 + 86211225 = 5622^2 + 9285^2 .

It is not a de Polignac number, because 117818109 - 2⁸ = 117817853 is a prime.

It is a super-2 number, since 2×117818109² = 27762213616671762, which contains 22 as substring.

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

It is a fibodiv number, since the Fibonacci-like sequence with seeds 117 and 818109 contains 117818109 itself.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117818179) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384874 + ... + 385179.

It is an arithmetic number, because the mean of its divisors is an integer number (15016053).

Almost surely, 2^117818109 is an apocalyptic number.

It is an amenable number.

117818109 is a deficient number, since it is larger than the sum of its proper divisors (62374527).

117818109 is a wasteful number, since it uses less digits than its factorization.

117818109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770076 (or 770073 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 36.

The square root of 117818109 is about 10854.4050504853. The cubic root of 117818109 is about 490.2346633885.

The spelling of 117818109 in words is "one hundred seventeen million, eight hundred eighteen thousand, one hundred nine".