286993 has 6 divisors (see below), whose sum is σ = 333906. Its totient is φ = 245952.

The previous prime is 286987. The next prime is 286999. The reversal of 286993 is 399682.

It is an interprime number because it is at equal distance from previous prime (286987) and next prime (286999).

It can be written as a sum of positive squares in only one way, i.e., 283024 + 3969 = 532^2 + 63^2 .

It is not a de Polignac number, because 286993 - 2¹³ = 278801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (286999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2880 + ... + 2977.

It is an arithmetic number, because the mean of its divisors is an integer number (55651).

2²⁸⁶⁹⁹³ is an apocalyptic number.

It is an amenable number.

286993 is a deficient number, since it is larger than the sum of its proper divisors (46913).

286993 is an equidigital number, since it uses as much as digits as its factorization.

286993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5871 (or 5864 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 286993 is about 535.7172761821. The cubic root of 286993 is about 65.9614865600.

It can be divided in two parts, 28 and 6993, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 286993 in words is "two hundred eighty-six thousand, nine hundred ninety-three".