284989 has 2 divisors, whose sum is σ = 284990. Its totient is φ = 284988.

The previous prime is 284969. The next prime is 285007. The reversal of 284989 is 989482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284089 + 900 = 533^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 284989 - 2⁵ = 284957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142494 + 142495.

It is an arithmetic number, because the mean of its divisors is an integer number (142495).

2²⁸⁴⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

284989 is a deficient number, since it is larger than the sum of its proper divisors (1).

284989 is an equidigital number, since it uses as much as digits as its factorization.

284989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 40.

The square root of 284989 is about 533.8436100582. The cubic root of 284989 is about 65.8075969832.

The spelling of 284989 in words is "two hundred eighty-four thousand, nine hundred eighty-nine".