287849 has 2 divisors, whose sum is σ = 287850. Its totient is φ = 287848.

The previous prime is 287821. The next prime is 287851. The reversal of 287849 is 948782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193600 + 94249 = 440^2 + 307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287849 is a prime.

It is a Sophie Germain prime.

Together with 287851, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287849.

It is not a weakly prime, because it can be changed into another prime (287149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143924 + 143925.

It is an arithmetic number, because the mean of its divisors is an integer number (143925).

2²⁸⁷⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

287849 is a deficient number, since it is larger than the sum of its proper divisors (1).

287849 is an equidigital number, since it uses as much as digits as its factorization.

287849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 287849 is about 536.5156102109. The cubic root of 287849 is about 66.0270015016.

The spelling of 287849 in words is "two hundred eighty-seven thousand, eight hundred forty-nine".