289385669 has 2 divisors, whose sum is σ = 289385670. Its totient is φ = 289385668.

The previous prime is 289385659. The next prime is 289385683. The reversal of 289385669 is 966583982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273505444 + 15880225 = 16538^2 + 3985^2 .

It is a cyclic number.

It is not a de Polignac number, because 289385669 - 2⁸ = 289385413 is a prime.

It is a super-2 number, since 2×289385669² = 167488130845155122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289385639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144692834 + 144692835.

It is an arithmetic number, because the mean of its divisors is an integer number (144692835).

Almost surely, 2^289385669 is an apocalyptic number.

It is an amenable number.

289385669 is a deficient number, since it is larger than the sum of its proper divisors (1).

289385669 is an equidigital number, since it uses as much as digits as its factorization.

289385669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 56.

The square root of 289385669 is about 17011.3394240430. The cubic root of 289385669 is about 661.4428710437.

The spelling of 289385669 in words is "two hundred eighty-nine million, three hundred eighty-five thousand, six hundred sixty-nine".