284731 has 2 divisors, whose sum is σ = 284732. Its totient is φ = 284730.

The previous prime is 284729. The next prime is 284737. The reversal of 284731 is 137482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 284731 - 2¹ = 284729 is a prime.

It is a super-2 number, since 2×284731² = 162143484722, which contains 22 as substring.

Together with 284729, it forms a pair of twin primes.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹¹ + 8³ + 7³ + 4⁹ + 3⁹ + 1 .

It is a junction number, because it is equal to n+sod(n) for n = 284696 and 284705.

It is not a weakly prime, because it can be changed into another prime (284737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142365 + 142366.

It is an arithmetic number, because the mean of its divisors is an integer number (142366).

2²⁸⁴⁷³¹ is an apocalyptic number.

284731 is a deficient number, since it is larger than the sum of its proper divisors (1).

284731 is an equidigital number, since it uses as much as digits as its factorization.

284731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 25.

The square root of 284731 is about 533.6019115408. The cubic root of 284731 is about 65.7877324901.

The spelling of 284731 in words is "two hundred eighty-four thousand, seven hundred thirty-one".