188009135 has 4 divisors (see below), whose sum is σ = 225610968. Its totient is φ = 150407304.

The previous prime is 188009119. The next prime is 188009147. The reversal of 188009135 is 531900881.

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

It is a cyclic number.

It is not a de Polignac number, because 188009135 - 2⁴ = 188009119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 188009095 and 188009104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18800909 + ... + 18800918.

It is an arithmetic number, because the mean of its divisors is an integer number (56402742).

Almost surely, 2^188009135 is an apocalyptic number.

188009135 is a deficient number, since it is larger than the sum of its proper divisors (37601833).

188009135 is an equidigital number, since it uses as much as digits as its factorization.

188009135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37601832.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 188009135 is about 13711.6423159299. The cubic root of 188009135 is about 572.8747100397.

The spelling of 188009135 in words is "one hundred eighty-eight million, nine thousand, one hundred thirty-five".