389287 has 2 divisors, whose sum is σ = 389288. Its totient is φ = 389286.

The previous prime is 389273. The next prime is 389297. The reversal of 389287 is 782983.

It is a strong prime.

It is an emirp because it is prime and its reverse (782983) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389287 is a prime.

It is a Chen prime.

389287 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194643 + 194644.

It is an arithmetic number, because the mean of its divisors is an integer number (194644).

2³⁸⁹²⁸⁷ is an apocalyptic number.

389287 is a deficient number, since it is larger than the sum of its proper divisors (1).

389287 is an equidigital number, since it uses as much as digits as its factorization.

389287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 389287 is about 623.9286818219. The cubic root of 389287 is about 73.0168848163.

It can be divided in two parts, 389 and 287, that added together give a palindrome (676).

The spelling of 389287 in words is "three hundred eighty-nine thousand, two hundred eighty-seven".