287279 has 2 divisors, whose sum is σ = 287280. Its totient is φ = 287278.

The previous prime is 287269. The next prime is 287281. The reversal of 287279 is 972782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 287279 - 2¹² = 283183 is a prime.

Together with 287281, it forms a pair of twin primes.

It is a Chen prime.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 143639 + 143640.

It is an arithmetic number, because the mean of its divisors is an integer number (143640).

2²⁸⁷²⁷⁹ is an apocalyptic number.

287279 is a deficient number, since it is larger than the sum of its proper divisors (1).

287279 is an equidigital number, since it uses as much as digits as its factorization.

287279 is an odious number, because the sum of its binary digits is odd.

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

The square root of 287279 is about 535.9841415564. The cubic root of 287279 is about 65.9833903719.

The spelling of 287279 in words is "two hundred eighty-seven thousand, two hundred seventy-nine".