287009887 has 2 divisors, whose sum is σ = 287009888. Its totient is φ = 287009886.

The previous prime is 287009869. The next prime is 287009927. The reversal of 287009887 is 788900782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 287009887 - 2¹¹ = 287007839 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 287009887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287009837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143504943 + 143504944.

It is an arithmetic number, because the mean of its divisors is an integer number (143504944).

Almost surely, 2^287009887 is an apocalyptic number.

287009887 is a deficient number, since it is larger than the sum of its proper divisors (1).

287009887 is an equidigital number, since it uses as much as digits as its factorization.

287009887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 49.

The square root of 287009887 is about 16941.3661491628. The cubic root of 287009887 is about 659.6278028472.

The spelling of 287009887 in words is "two hundred eighty-seven million, nine thousand, eight hundred eighty-seven".