287285087 has 4 divisors (see below), whose sum is σ = 289920840. Its totient is φ = 284649336.

The previous prime is 287285059. The next prime is 287285093. The reversal of 287285087 is 780582782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 287285087 - 2⁸ = 287284831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287285987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1317713 + ... + 1317930.

It is an arithmetic number, because the mean of its divisors is an integer number (72480210).

Almost surely, 2^287285087 is an apocalyptic number.

287285087 is a deficient number, since it is larger than the sum of its proper divisors (2635753).

287285087 is a wasteful number, since it uses less digits than its factorization.

287285087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635752.

The product of its (nonzero) digits is 501760, while the sum is 47.

The square root of 287285087 is about 16949.4863343996. The cubic root of 287285087 is about 659.8385639748.

The spelling of 287285087 in words is "two hundred eighty-seven million, two hundred eighty-five thousand, eighty-seven".