288867989 has 2 divisors, whose sum is σ = 288867990. Its totient is φ = 288867988.

The previous prime is 288867959. The next prime is 288868009. The reversal of 288867989 is 989768882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209033764 + 79834225 = 14458^2 + 8935^2 .

It is a cyclic number.

It is not a de Polignac number, because 288867989 - 2¹² = 288863893 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 (288867949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144433994 + 144433995.

It is an arithmetic number, because the mean of its divisors is an integer number (144433995).

Almost surely, 2^288867989 is an apocalyptic number.

It is an amenable number.

288867989 is a deficient number, since it is larger than the sum of its proper divisors (1).

288867989 is an equidigital number, since it uses as much as digits as its factorization.

288867989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27869184, while the sum is 65.

The square root of 288867989 is about 16996.1168800406. The cubic root of 288867989 is about 661.0482187774.

The spelling of 288867989 in words is "two hundred eighty-eight million, eight hundred sixty-seven thousand, nine hundred eighty-nine".