283821409 has 9 divisors (see below), whose sum is σ = 301803411. Its totient is φ = 266856480.

The previous prime is 283821407. The next prime is 283821427. The reversal of 283821409 is 904128382.

The square root of 283821409 is 16847.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 220968225 + 62853184 = 14865^2 + 7928^2 .

It is not a de Polignac number, because 283821409 - 2¹ = 283821407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (283821401) 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 in 8 ways as a sum of consecutive naturals, for example, 285904 + ... + 286894.

Almost surely, 2^283821409 is an apocalyptic number.

283821409 is the 16847-th square number.

283821409 is the 8424-th centered octagonal number.

It is an amenable number.

283821409 is a deficient number, since it is larger than the sum of its proper divisors (17982002).

283821409 is an frugal number, since it uses more digits than its factorization.

283821409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The cubic root of 283821409 is about 657.1760341675.

It can be divided in two parts, 28382 and 1409, that added together give a cube (29791 = 31³).

The spelling of 283821409 in words is "two hundred eighty-three million, eight hundred twenty-one thousand, four hundred nine".