189187 has 2 divisors, whose sum is σ = 189188. Its totient is φ = 189186.

The previous prime is 189169. The next prime is 189199. The reversal of 189187 is 781981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189187 - 2¹¹ = 187139 is a prime.

It is not a weakly prime, because it can be changed into another prime (189127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94593 + 94594.

It is an arithmetic number, because the mean of its divisors is an integer number (94594).

2¹⁸⁹¹⁸⁷ is an apocalyptic number.

189187 is a deficient number, since it is larger than the sum of its proper divisors (1).

189187 is an equidigital number, since it uses as much as digits as its factorization.

189187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 34.

The square root of 189187 is about 434.9563196460. The cubic root of 189187 is about 57.4068561296.

The spelling of 189187 in words is "one hundred eighty-nine thousand, one hundred eighty-seven".