284645393 has 2 divisors, whose sum is σ = 284645394. Its totient is φ = 284645392.

The previous prime is 284645369. The next prime is 284645437. The reversal of 284645393 is 393546482.

It is an a-pointer prime, because the next prime (284645437) can be obtained adding 284645393 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158936449 + 125708944 = 12607^2 + 11212^2 .

It is a cyclic number.

It is not a de Polignac number, because 284645393 - 2¹² = 284641297 is a prime.

It is a super-2 number, since 2×284645393² = 162045999512248898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (284645303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142322696 + 142322697.

It is an arithmetic number, because the mean of its divisors is an integer number (142322697).

Almost surely, 2^284645393 is an apocalyptic number.

It is an amenable number.

284645393 is a deficient number, since it is larger than the sum of its proper divisors (1).

284645393 is an equidigital number, since it uses as much as digits as its factorization.

284645393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 44.

The square root of 284645393 is about 16871.4371942642. The cubic root of 284645393 is about 657.8113859976.

The spelling of 284645393 in words is "two hundred eighty-four million, six hundred forty-five thousand, three hundred ninety-three".