286997 has 4 divisors (see below), whose sum is σ = 289740. Its totient is φ = 284256.

The previous prime is 286987. The next prime is 286999. The reversal of 286997 is 799682.

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

It can be written as a sum of positive squares in 2 ways, for example, as 119716 + 167281 = 346^2 + 409^2 .

It is a cyclic number.

It is not a de Polignac number, because 286997 - 2⁴ = 286981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 286997.

It is not an unprimeable number, because it can be changed into a prime (286999) 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 in 3 ways as a sum of consecutive naturals, for example, 1208 + ... + 1425.

It is an arithmetic number, because the mean of its divisors is an integer number (72435).

2²⁸⁶⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

286997 is a deficient number, since it is larger than the sum of its proper divisors (2743).

286997 is a wasteful number, since it uses less digits than its factorization.

286997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742.

The product of its digits is 54432, while the sum is 41.

The square root of 286997 is about 535.7210094816. The cubic root of 286997 is about 65.9617930074.

The spelling of 286997 in words is "two hundred eighty-six thousand, nine hundred ninety-seven".