281189 has 2 divisors, whose sum is σ = 281190. Its totient is φ = 281188.

The previous prime is 281167. The next prime is 281191. The reversal of 281189 is 981182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280900 + 289 = 530^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 281189 - 2⁸ = 280933 is a prime.

Together with 281191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140594 + 140595.

It is an arithmetic number, because the mean of its divisors is an integer number (140595).

2²⁸¹¹⁸⁹ is an apocalyptic number.

It is an amenable number.

281189 is a deficient number, since it is larger than the sum of its proper divisors (1).

281189 is an equidigital number, since it uses as much as digits as its factorization.

281189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 29.

The square root of 281189 is about 530.2725714196. The cubic root of 281189 is about 65.5137977653.

The spelling of 281189 in words is "two hundred eighty-one thousand, one hundred eighty-nine".