188673869 has 2 divisors, whose sum is σ = 188673870. Its totient is φ = 188673868.

The previous prime is 188673731. The next prime is 188673887. The reversal of 188673869 is 968376881.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180579844 + 8094025 = 13438^2 + 2845^2 .

It is a cyclic number.

It is not a de Polignac number, because 188673869 - 2²⁰ = 187625293 is a prime.

It is a super-2 number, since 2×188673869² = 71195657686858322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (184673869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94336934 + 94336935.

It is an arithmetic number, because the mean of its divisors is an integer number (94336935).

Almost surely, 2^188673869 is an apocalyptic number.

It is an amenable number.

188673869 is a deficient number, since it is larger than the sum of its proper divisors (1).

188673869 is an equidigital number, since it uses as much as digits as its factorization.

188673869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 56.

The square root of 188673869 is about 13735.8606938189. The cubic root of 188673869 is about 573.5490768721.

The spelling of 188673869 in words is "one hundred eighty-eight million, six hundred seventy-three thousand, eight hundred sixty-nine".