188401 has 2 divisors, whose sum is σ = 188402. Its totient is φ = 188400.

The previous prime is 188389. The next prime is 188407. The reversal of 188401 is 104881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112225 + 76176 = 335^2 + 276^2 .

It is a cyclic number.

It is not a de Polignac number, because 188401 - 2⁵ = 188369 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (188407) 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 as a sum of consecutive naturals, namely, 94200 + 94201.

It is an arithmetic number, because the mean of its divisors is an integer number (94201).

2¹⁸⁸⁴⁰¹ is an apocalyptic number.

It is an amenable number.

188401 is a deficient number, since it is larger than the sum of its proper divisors (1).

188401 is an equidigital number, since it uses as much as digits as its factorization.

188401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 188401 is about 434.0518402219. The cubic root of 188401 is about 57.3272445610.

The spelling of 188401 in words is "one hundred eighty-eight thousand, four hundred one".