286987 has 2 divisors, whose sum is σ = 286988. Its totient is φ = 286986.

The previous prime is 286981. The next prime is 286999. The reversal of 286987 is 789682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 286987 - 2⁷ = 286859 is a prime.

286987 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (286981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143493 + 143494.

It is an arithmetic number, because the mean of its divisors is an integer number (143494).

2²⁸⁶⁹⁸⁷ is an apocalyptic number.

286987 is a deficient number, since it is larger than the sum of its proper divisors (1).

286987 is an equidigital number, since it uses as much as digits as its factorization.

286987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 286987 is about 535.7116761841. The cubic root of 286987 is about 65.9610268837.

It can be divided in two parts, 286 and 987, that multiplied together give a palindrome (282282).

The spelling of 286987 in words is "two hundred eighty-six thousand, nine hundred eighty-seven".