117203189 has 4 divisors (see below), whose sum is σ = 117409740. Its totient is φ = 116996640.

The previous prime is 117203171. The next prime is 117203197. The reversal of 117203189 is 981302711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 981302711 = 127 ⋅7726793.

It can be written as a sum of positive squares in 2 ways, for example, as 67782289 + 49420900 = 8233^2 + 7030^2 .

It is a cyclic number.

It is not a de Polignac number, because 117203189 - 2¹⁶ = 117137653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117203129) 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, 102422 + ... + 103559.

It is an arithmetic number, because the mean of its divisors is an integer number (29352435).

Almost surely, 2^117203189 is an apocalyptic number.

It is an amenable number.

117203189 is a deficient number, since it is larger than the sum of its proper divisors (206551).

117203189 is an equidigital number, since it uses as much as digits as its factorization.

117203189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206550.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 117203189 is about 10826.0421669232. The cubic root of 117203189 is about 489.3802925213.

The spelling of 117203189 in words is "one hundred seventeen million, two hundred three thousand, one hundred eighty-nine".