289397 has 2 divisors, whose sum is σ = 289398. Its totient is φ = 289396.

The previous prime is 289381. The next prime is 289417. The reversal of 289397 is 793982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271441 + 17956 = 521^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 289397 - 2⁴ = 289381 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 289397.

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 289397.

It is not a weakly prime, because it can be changed into another prime (289297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144698 + 144699.

It is an arithmetic number, because the mean of its divisors is an integer number (144699).

2²⁸⁹³⁹⁷ is an apocalyptic number.

It is an amenable number.

289397 is a deficient number, since it is larger than the sum of its proper divisors (1).

289397 is an equidigital number, since it uses as much as digits as its factorization.

289397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 289397 is about 537.9563179293. The cubic root of 289397 is about 66.1451503942.

Adding to 289397 its product of digits (27216), we get a palindrome (316613).

It can be divided in two parts, 289 and 397, that added together give a palindrome (686).

The spelling of 289397 in words is "two hundred eighty-nine thousand, three hundred ninety-seven".