188850809 has 12 divisors (see below), whose sum is σ = 218030976. Its totient is φ = 160237512.

The previous prime is 188850803. The next prime is 188850829. The reversal of 188850809 is 908058881.

It is not a de Polignac number, because 188850809 - 2⁴ = 188850793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (188850803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72992 + ... + 75534.

It is an arithmetic number, because the mean of its divisors is an integer number (18169248).

Almost surely, 2^188850809 is an apocalyptic number.

It is an amenable number.

188850809 is a deficient number, since it is larger than the sum of its proper divisors (29180167).

188850809 is an equidigital number, since it uses as much as digits as its factorization.

188850809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756 (or 2653 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 47.

The square root of 188850809 is about 13742.2999894486. The cubic root of 188850809 is about 573.7283139627.

The spelling of 188850809 in words is "one hundred eighty-eight million, eight hundred fifty thousand, eight hundred nine".