287860871 has 2 divisors, whose sum is σ = 287860872. Its totient is φ = 287860870.

The previous prime is 287860829. The next prime is 287860879. The reversal of 287860871 is 178068782.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287860871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287860879) 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, 143930435 + 143930436.

It is an arithmetic number, because the mean of its divisors is an integer number (143930436).

Almost surely, 2^287860871 is an apocalyptic number.

287860871 is a deficient number, since it is larger than the sum of its proper divisors (1).

287860871 is an equidigital number, since it uses as much as digits as its factorization.

287860871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 301056, while the sum is 47.

The square root of 287860871 is about 16966.4631258256. The cubic root of 287860871 is about 660.2790914845.

The spelling of 287860871 in words is "two hundred eighty-seven million, eight hundred sixty thousand, eight hundred seventy-one".