287806487 has 2 divisors, whose sum is σ = 287806488. Its totient is φ = 287806486.

The previous prime is 287806397. The next prime is 287806489. The reversal of 287806487 is 784608782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 287806487 - 2⁸ = 287806231 is a prime.

Together with 287806489, 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 (287806489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143903243 + 143903244.

It is an arithmetic number, because the mean of its divisors is an integer number (143903244).

Almost surely, 2^287806487 is an apocalyptic number.

287806487 is a deficient number, since it is larger than the sum of its proper divisors (1).

287806487 is an equidigital number, since it uses as much as digits as its factorization.

287806487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1204224, while the sum is 50.

The square root of 287806487 is about 16964.8603589891. The cubic root of 287806487 is about 660.2375078779.

The spelling of 287806487 in words is "two hundred eighty-seven million, eight hundred six thousand, four hundred eighty-seven".