289381 has 2 divisors, whose sum is σ = 289382. Its totient is φ = 289380.

The previous prime is 289369. The next prime is 289397. The reversal of 289381 is 183982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285156 + 4225 = 534^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 289381 - 2⁵ = 289349 is a prime.

It is a super-2 number, since 2×289381² = 167482726322, which contains 22 as substring.

It is a Chen prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144690 + 144691.

It is an arithmetic number, because the mean of its divisors is an integer number (144691).

2²⁸⁹³⁸¹ is an apocalyptic number.

It is an amenable number.

289381 is a deficient number, since it is larger than the sum of its proper divisors (1).

289381 is an equidigital number, since it uses as much as digits as its factorization.

289381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 289381 is about 537.9414466278. The cubic root of 289381 is about 66.1439313746.

It can be divided in two parts, 28 and 9381, that added together give a square (9409 = 97²).

The spelling of 289381 in words is "two hundred eighty-nine thousand, three hundred eighty-one".