287671 has 2 divisors, whose sum is σ = 287672. Its totient is φ = 287670.

The previous prime is 287669. The next prime is 287681. The reversal of 287671 is 176782.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 287671 - 2¹ = 287669 is a prime.

Together with 287669, 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 (287611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143835 + 143836.

It is an arithmetic number, because the mean of its divisors is an integer number (143836).

2²⁸⁷⁶⁷¹ is an apocalyptic number.

287671 is a deficient number, since it is larger than the sum of its proper divisors (1).

287671 is an equidigital number, since it uses as much as digits as its factorization.

287671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 31.

The square root of 287671 is about 536.3496993567. The cubic root of 287671 is about 66.0133887744.

Subtracting from 287671 its reverse (176782), we obtain a square (110889 = 333²).

The spelling of 287671 in words is "two hundred eighty-seven thousand, six hundred seventy-one".