289871 has 2 divisors, whose sum is σ = 289872. Its totient is φ = 289870.

The previous prime is 289859. The next prime is 289889. The reversal of 289871 is 178982.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289871 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 289871.

It is not a weakly prime, because it can be changed into another prime (289841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144935 + 144936.

It is an arithmetic number, because the mean of its divisors is an integer number (144936).

2²⁸⁹⁸⁷¹ is an apocalyptic number.

289871 is a deficient number, since it is larger than the sum of its proper divisors (1).

289871 is an equidigital number, since it uses as much as digits as its factorization.

289871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 35.

The square root of 289871 is about 538.3966938977. The cubic root of 289871 is about 66.1812434882.

Subtracting from 289871 its reverse (178982), we obtain a square (110889 = 333²).

The spelling of 289871 in words is "two hundred eighty-nine thousand, eight hundred seventy-one".