287297 has 2 divisors, whose sum is σ = 287298. Its totient is φ = 287296.

The previous prime is 287291. The next prime is 287321. The reversal of 287297 is 792782.

It is a Cunningham number, because it is equal to 536²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287296 + 1 = 536^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 287297 - 2⁴ = 287281 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287297.

It is not a weakly prime, because it can be changed into another prime (287291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143648 + 143649.

It is an arithmetic number, because the mean of its divisors is an integer number (143649).

2²⁸⁷²⁹⁷ is an apocalyptic number.

It is an amenable number.

287297 is a deficient number, since it is larger than the sum of its proper divisors (1).

287297 is an equidigital number, since it uses as much as digits as its factorization.

287297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 35.

The square root of 287297 is about 536.0009328350. Note that the first 3 decimals coincide. The cubic root of 287297 is about 65.9847684472.

The spelling of 287297 in words is "two hundred eighty-seven thousand, two hundred ninety-seven".