289643 has 2 divisors, whose sum is σ = 289644. Its totient is φ = 289642.

The previous prime is 289637. The next prime is 289657. The reversal of 289643 is 346982.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289643 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (289603) 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, 144821 + 144822.

It is an arithmetic number, because the mean of its divisors is an integer number (144822).

2²⁸⁹⁶⁴³ is an apocalyptic number.

289643 is a deficient number, since it is larger than the sum of its proper divisors (1).

289643 is an equidigital number, since it uses as much as digits as its factorization.

289643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 289643 is about 538.1849124604. The cubic root of 289643 is about 66.1638871683.

The spelling of 289643 in words is "two hundred eighty-nine thousand, six hundred forty-three".