284839 has 2 divisors, whose sum is σ = 284840. Its totient is φ = 284838.

The previous prime is 284833. The next prime is 284857. The reversal of 284839 is 938482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 284839 - 2³ = 284831 is a prime.

It is a super-2 number, since 2×284839² = 162266511842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142419 + 142420.

It is an arithmetic number, because the mean of its divisors is an integer number (142420).

2²⁸⁴⁸³⁹ is an apocalyptic number.

284839 is a deficient number, since it is larger than the sum of its proper divisors (1).

284839 is an equidigital number, since it uses as much as digits as its factorization.

284839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 284839 is about 533.7031009841. The cubic root of 284839 is about 65.7960493189.

The spelling of 284839 in words is "two hundred eighty-four thousand, eight hundred thirty-nine".