284729 has 2 divisors, whose sum is σ = 284730. Its totient is φ = 284728.

The previous prime is 284723. The next prime is 284731. The reversal of 284729 is 927482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182329 + 102400 = 427^2 + 320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284729 is a prime.

Together with 284731, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 284695 and 284704.

It is not a weakly prime, because it can be changed into another prime (284723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142364 + 142365.

It is an arithmetic number, because the mean of its divisors is an integer number (142365).

2²⁸⁴⁷²⁹ is an apocalyptic number.

It is an amenable number.

284729 is a deficient number, since it is larger than the sum of its proper divisors (1).

284729 is an equidigital number, since it uses as much as digits as its factorization.

284729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 284729 is about 533.6000374813. The cubic root of 284729 is about 65.7875784549.

The spelling of 284729 in words is "two hundred eighty-four thousand, seven hundred twenty-nine".