289905089 has 2 divisors, whose sum is σ = 289905090. Its totient is φ = 289905088.

The previous prime is 289905073. The next prime is 289905113. The reversal of 289905089 is 980509982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250114225 + 39790864 = 15815^2 + 6308^2 .

It is a cyclic number.

It is not a de Polignac number, because 289905089 - 2⁴ = 289905073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (289905019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144952544 + 144952545.

It is an arithmetic number, because the mean of its divisors is an integer number (144952545).

Almost surely, 2^289905089 is an apocalyptic number.

It is an amenable number.

289905089 is a deficient number, since it is larger than the sum of its proper divisors (1).

289905089 is an equidigital number, since it uses as much as digits as its factorization.

289905089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 289905089 is about 17026.5994549704. The cubic root of 289905089 is about 661.8383770426.

The spelling of 289905089 in words is "two hundred eighty-nine million, nine hundred five thousand, eighty-nine".