289787669 has 2 divisors, whose sum is σ = 289787670. Its totient is φ = 289787668.

The previous prime is 289787657. The next prime is 289787689. The reversal of 289787669 is 966787982.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172607044 + 117180625 = 13138^2 + 10825^2 .

It is a cyclic number.

It is not a de Polignac number, because 289787669 - 2¹⁶ = 289722133 is a prime.

It is a super-2 number, since 2×289787669² = 167953786208907122, 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 (289787609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144893834 + 144893835.

It is an arithmetic number, because the mean of its divisors is an integer number (144893835).

Almost surely, 2^289787669 is an apocalyptic number.

It is an amenable number.

289787669 is a deficient number, since it is larger than the sum of its proper divisors (1).

289787669 is an equidigital number, since it uses as much as digits as its factorization.

289787669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 62.

The square root of 289787669 is about 17023.1509715446. The cubic root of 289787669 is about 661.7490103733.

The spelling of 289787669 in words is "two hundred eighty-nine million, seven hundred eighty-seven thousand, six hundred sixty-nine".