188742117 has 16 divisors (see below), whose sum is σ = 263456640. Its totient is φ = 119963712.

The previous prime is 188742097. The next prime is 188742173. The reversal of 188742117 is 711247881.

It is not a de Polignac number, because 188742117 - 2¹⁰ = 188741093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188740117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17559 + ... + 26187.

It is an arithmetic number, because the mean of its divisors is an integer number (16466040).

Almost surely, 2^188742117 is an apocalyptic number.

It is an amenable number.

188742117 is a deficient number, since it is larger than the sum of its proper divisors (74714523).

188742117 is a wasteful number, since it uses less digits than its factorization.

188742117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8972.

The product of its digits is 25088, while the sum is 39.

The square root of 188742117 is about 13738.3447692944. The cubic root of 188742117 is about 573.6182241593.

Adding to 188742117 its reverse (711247881), we get a palindrome (899989998).

The spelling of 188742117 in words is "one hundred eighty-eight million, seven hundred forty-two thousand, one hundred seventeen".