117188928389 has 4 divisors (see below), whose sum is σ = 126203461356. Its totient is φ = 108174395424.

The previous prime is 117188928379. The next prime is 117188928397. The reversal of 117188928389 is 983829881711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11830260289 + 105358668100 = 108767^2 + 324590^2 .

It is a cyclic number.

It is not a de Polignac number, because 117188928389 - 2²⁰ = 117187879813 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 (117188928349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4507266464 + ... + 4507266489.

It is an arithmetic number, because the mean of its divisors is an integer number (31550865339).

Almost surely, 2^117188928389 is an apocalyptic number.

It is an amenable number.

117188928389 is a deficient number, since it is larger than the sum of its proper divisors (9014532967).

117188928389 is an equidigital number, since it uses as much as digits as its factorization.

117188928389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9014532966.

The product of its digits is 13934592, while the sum is 65.

The spelling of 117188928389 in words is "one hundred seventeen billion, one hundred eighty-eight million, nine hundred twenty-eight thousand, three hundred eighty-nine".