288704989 has 2 divisors, whose sum is σ = 288704990. Its totient is φ = 288704988.

The previous prime is 288704971. The next prime is 288705031. The reversal of 288704989 is 989407882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254657764 + 34047225 = 15958^2 + 5835^2 .

It is a cyclic number.

It is not a de Polignac number, because 288704989 - 2¹¹ = 288702941 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (288704929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144352494 + 144352495.

It is an arithmetic number, because the mean of its divisors is an integer number (144352495).

Almost surely, 2^288704989 is an apocalyptic number.

It is an amenable number.

288704989 is a deficient number, since it is larger than the sum of its proper divisors (1).

288704989 is an equidigital number, since it uses as much as digits as its factorization.

288704989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The square root of 288704989 is about 16991.3209904351. The cubic root of 288704989 is about 660.9238584732.

The spelling of 288704989 in words is "two hundred eighty-eight million, seven hundred four thousand, nine hundred eighty-nine".