284489 has 2 divisors, whose sum is σ = 284490. Its totient is φ = 284488.

The previous prime is 284483. The next prime is 284507. The reversal of 284489 is 984482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284089 + 400 = 533^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 284489 - 2⁸ = 284233 is a prime.

It is a super-2 number, since 2×284489² = 161867982242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (284483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142244 + 142245.

It is an arithmetic number, because the mean of its divisors is an integer number (142245).

2²⁸⁴⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

284489 is a deficient number, since it is larger than the sum of its proper divisors (1).

284489 is an equidigital number, since it uses as much as digits as its factorization.

284489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 35.

The square root of 284489 is about 533.3751025310. The cubic root of 284489 is about 65.7690889940.

It can be divided in two parts, 2844 and 89, that multiplied together give a triangular number (253116 = T₇₁₁).

The spelling of 284489 in words is "two hundred eighty-four thousand, four hundred eighty-nine".