284749 has 2 divisors, whose sum is σ = 284750. Its totient is φ = 284748.

The previous prime is 284747. The next prime is 284759. The reversal of 284749 is 947482.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260100 + 24649 = 510^2 + 157^2 .

It is a cyclic number.

It is not a de Polignac number, because 284749 - 2¹ = 284747 is a prime.

Together with 284747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142374 + 142375.

It is an arithmetic number, because the mean of its divisors is an integer number (142375).

2²⁸⁴⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

284749 is a deficient number, since it is larger than the sum of its proper divisors (1).

284749 is an equidigital number, since it uses as much as digits as its factorization.

284749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 284749 is about 533.6187777805. The cubic root of 284749 is about 65.7891187742.

The spelling of 284749 in words is "two hundred eighty-four thousand, seven hundred forty-nine".