284923 has 4 divisors (see below), whose sum is σ = 289008. Its totient is φ = 280840.

The previous prime is 284917. The next prime is 284927. The reversal of 284923 is 329482.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284923 is a prime.

It is a super-2 number, since 2×284923² = 162362231858, which contains 22 as substring.

It is a Duffinian number.

284923 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 284891 and 284900.

It is not an unprimeable number, because it can be changed into a prime (284927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1936 + ... + 2077.

It is an arithmetic number, because the mean of its divisors is an integer number (72252).

2²⁸⁴⁹²³ is an apocalyptic number.

284923 is a deficient number, since it is larger than the sum of its proper divisors (4085).

284923 is an equidigital number, since it uses as much as digits as its factorization.

284923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4084.

The product of its digits is 3456, while the sum is 28.

The square root of 284923 is about 533.7817906223. The cubic root of 284923 is about 65.8025165102.

The spelling of 284923 in words is "two hundred eighty-four thousand, nine hundred twenty-three".