284509649 has 2 divisors, whose sum is σ = 284509650. Its totient is φ = 284509648.

The previous prime is 284509639. The next prime is 284509669. The reversal of 284509649 is 946905482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149206225 + 135303424 = 12215^2 + 11632^2 .

It is a cyclic number.

It is not a de Polignac number, because 284509649 - 2¹² = 284505553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (284509639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142254824 + 142254825.

It is an arithmetic number, because the mean of its divisors is an integer number (142254825).

Almost surely, 2^284509649 is an apocalyptic number.

It is an amenable number.

284509649 is a deficient number, since it is larger than the sum of its proper divisors (1).

284509649 is an equidigital number, since it uses as much as digits as its factorization.

284509649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 284509649 is about 16867.4138207373. The cubic root of 284509649 is about 657.7068018973.

The spelling of 284509649 in words is "two hundred eighty-four million, five hundred nine thousand, six hundred forty-nine".