283238821 has 2 divisors, whose sum is σ = 283238822. Its totient is φ = 283238820.

The previous prime is 283238803. The next prime is 283238831. The reversal of 283238821 is 128832382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207792225 + 75446596 = 14415^2 + 8686^2 .

It is a cyclic number.

It is not a de Polignac number, because 283238821 - 2⁷ = 283238693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (283238831) 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, 141619410 + 141619411.

It is an arithmetic number, because the mean of its divisors is an integer number (141619411).

Almost surely, 2^283238821 is an apocalyptic number.

It is an amenable number.

283238821 is a deficient number, since it is larger than the sum of its proper divisors (1).

283238821 is an equidigital number, since it uses as much as digits as its factorization.

283238821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 37.

The square root of 283238821 is about 16829.7005618044. The cubic root of 283238821 is about 656.7260738281.

The spelling of 283238821 in words is "two hundred eighty-three million, two hundred thirty-eight thousand, eight hundred twenty-one".