284891 has 4 divisors (see below), whose sum is σ = 285984. Its totient is φ = 283800.

The previous prime is 284881. The next prime is 284897. The reversal of 284891 is 198482.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 198482 = 2 ⋅99241.

It is a cyclic number.

It is not a de Polignac number, because 284891 - 2¹⁴ = 268507 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 284891.

It is not an unprimeable number, because it can be changed into a prime (284897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101 + ... + 761.

It is an arithmetic number, because the mean of its divisors is an integer number (71496).

2²⁸⁴⁸⁹¹ is an apocalyptic number.

284891 is a deficient number, since it is larger than the sum of its proper divisors (1093).

284891 is an equidigital number, since it uses as much as digits as its factorization.

284891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092.

The product of its digits is 4608, while the sum is 32.

The square root of 284891 is about 533.7518149852. The cubic root of 284891 is about 65.8000529682.

The spelling of 284891 in words is "two hundred eighty-four thousand, eight hundred ninety-one".