284666749 has 2 divisors, whose sum is σ = 284666750. Its totient is φ = 284666748.

The previous prime is 284666741. The next prime is 284666807. The reversal of 284666749 is 947666482.

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., 283686649 + 980100 = 16843^2 + 990^2 .

It is a cyclic number.

It is not a de Polignac number, because 284666749 - 2³ = 284666741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 284666696 and 284666705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284666741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142333374 + 142333375.

It is an arithmetic number, because the mean of its divisors is an integer number (142333375).

Almost surely, 2^284666749 is an apocalyptic number.

It is an amenable number.

284666749 is a deficient number, since it is larger than the sum of its proper divisors (1).

284666749 is an equidigital number, since it uses as much as digits as its factorization.

284666749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 52.

The square root of 284666749 is about 16872.0700863883. The cubic root of 284666749 is about 657.8278367219.

The spelling of 284666749 in words is "two hundred eighty-four million, six hundred sixty-six thousand, seven hundred forty-nine".