287700089 has 2 divisors, whose sum is σ = 287700090. Its totient is φ = 287700088.

The previous prime is 287700047. The next prime is 287700151. The reversal of 287700089 is 980007782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275394025 + 12306064 = 16595^2 + 3508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287700089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (287700029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143850044 + 143850045.

It is an arithmetic number, because the mean of its divisors is an integer number (143850045).

Almost surely, 2^287700089 is an apocalyptic number.

It is an amenable number.

287700089 is a deficient number, since it is larger than the sum of its proper divisors (1).

287700089 is an equidigital number, since it uses as much as digits as its factorization.

287700089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 287700089 is about 16961.7242342870. The cubic root of 287700089 is about 660.1561376843.

The spelling of 287700089 in words is "two hundred eighty-seven million, seven hundred thousand, eighty-nine".