287269 has 2 divisors, whose sum is σ = 287270. Its totient is φ = 287268.

The previous prime is 287257. The next prime is 287279. The reversal of 287269 is 962782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214369 + 72900 = 463^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 287269 - 2⁵ = 287237 is a prime.

It is a super-2 number, since 2×287269² = 165046956722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143634 + 143635.

It is an arithmetic number, because the mean of its divisors is an integer number (143635).

2²⁸⁷²⁶⁹ is an apocalyptic number.

It is an amenable number.

287269 is a deficient number, since it is larger than the sum of its proper divisors (1).

287269 is an equidigital number, since it uses as much as digits as its factorization.

287269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 287269 is about 535.9748128411. The cubic root of 287269 is about 65.9826247497.

The spelling of 287269 in words is "two hundred eighty-seven thousand, two hundred sixty-nine".