284281493 has 2 divisors, whose sum is σ = 284281494. Its totient is φ = 284281492.

The previous prime is 284281451. The next prime is 284281507. The reversal of 284281493 is 394182482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221206129 + 63075364 = 14873^2 + 7942^2 .

It is a cyclic number.

It is not a de Polignac number, because 284281493 - 2²⁴ = 267504277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 284281493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284281433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142140746 + 142140747.

It is an arithmetic number, because the mean of its divisors is an integer number (142140747).

Almost surely, 2^284281493 is an apocalyptic number.

It is an amenable number.

284281493 is a deficient number, since it is larger than the sum of its proper divisors (1).

284281493 is an equidigital number, since it uses as much as digits as its factorization.

284281493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 41.

The square root of 284281493 is about 16860.6492460996. The cubic root of 284281493 is about 657.5309439094.

The spelling of 284281493 in words is "two hundred eighty-four million, two hundred eighty-one thousand, four hundred ninety-three".