284549989 has 2 divisors, whose sum is σ = 284549990. Its totient is φ = 284549988.

The previous prime is 284549983. The next prime is 284550053. The reversal of 284549989 is 989945482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200222500 + 84327489 = 14150^2 + 9183^2 .

It is a cyclic number.

It is not a de Polignac number, because 284549989 - 2⁹ = 284549477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284549983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142274994 + 142274995.

It is an arithmetic number, because the mean of its divisors is an integer number (142274995).

Almost surely, 2^284549989 is an apocalyptic number.

It is an amenable number.

284549989 is a deficient number, since it is larger than the sum of its proper divisors (1).

284549989 is an equidigital number, since it uses as much as digits as its factorization.

284549989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7464960, while the sum is 58.

The square root of 284549989 is about 16868.6095751843. The cubic root of 284549989 is about 657.7378853639.

The spelling of 284549989 in words is "two hundred eighty-four million, five hundred forty-nine thousand, nine hundred eighty-nine".