188081069 has 24 divisors (see below), whose sum is σ = 212587200. Its totient is φ = 166224960.

The previous prime is 188081021. The next prime is 188081093. The reversal of 188081069 is 960180881.

It is not a de Polignac number, because 188081069 - 2²⁰ = 187032493 is a prime.

It is a super-2 number, since 2×188081069² = 70748977032365522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188081669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 945032 + ... + 945230.

It is an arithmetic number, because the mean of its divisors is an integer number (8857800).

Almost surely, 2^188081069 is an apocalyptic number.

It is an amenable number.

188081069 is a deficient number, since it is larger than the sum of its proper divisors (24506131).

188081069 is a wasteful number, since it uses less digits than its factorization.

188081069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 41.

The square root of 188081069 is about 13714.2651644191. The cubic root of 188081069 is about 572.9477630766.

The spelling of 188081069 in words is "one hundred eighty-eight million, eighty-one thousand, sixty-nine".