188869 has 2 divisors, whose sum is σ = 188870. Its totient is φ = 188868.

The previous prime is 188863. The next prime is 188891. The reversal of 188869 is 968881.

It is a happy number.

188869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184900 + 3969 = 430^2 + 63^2 .

It is a cyclic number.

It is not a de Polignac number, because 188869 - 2³ = 188861 is a prime.

It is a super-2 number, since 2×188869² = 71342998322, which contains 22 as substring.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94434 + 94435.

It is an arithmetic number, because the mean of its divisors is an integer number (94435).

2¹⁸⁸⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

188869 is a deficient number, since it is larger than the sum of its proper divisors (1).

188869 is an equidigital number, since it uses as much as digits as its factorization.

188869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 40.

The square root of 188869 is about 434.5906119557. The cubic root of 188869 is about 57.3746734776.

The spelling of 188869 in words is "one hundred eighty-eight thousand, eight hundred sixty-nine".