289655669 has 2 divisors, whose sum is σ = 289655670. Its totient is φ = 289655668.

The previous prime is 289655657. The next prime is 289655671. The reversal of 289655669 is 966556982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192376900 + 97278769 = 13870^2 + 9863^2 .

It is a cyclic number.

It is not a de Polignac number, because 289655669 - 2¹² = 289651573 is a prime.

It is a super-2 number, since 2×289655669² = 167800813167675122, which contains 22 as substring.

Together with 289655671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289655609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144827834 + 144827835.

It is an arithmetic number, because the mean of its divisors is an integer number (144827835).

Almost surely, 2^289655669 is an apocalyptic number.

It is an amenable number.

289655669 is a deficient number, since it is larger than the sum of its proper divisors (1).

289655669 is an equidigital number, since it uses as much as digits as its factorization.

289655669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6998400, while the sum is 56.

The square root of 289655669 is about 17019.2734568782. The cubic root of 289655669 is about 661.6485182487.

The spelling of 289655669 in words is "two hundred eighty-nine million, six hundred fifty-five thousand, six hundred sixty-nine".