284057317 has 2 divisors, whose sum is σ = 284057318. Its totient is φ = 284057316.

The previous prime is 284057303. The next prime is 284057321. The reversal of 284057317 is 713750482.

It is a Cunningham number, because it is equal to 16854²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284057316 + 1 = 16854^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 284057317 - 2¹¹ = 284055269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284057357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142028658 + 142028659.

It is an arithmetic number, because the mean of its divisors is an integer number (142028659).

Almost surely, 2^284057317 is an apocalyptic number.

It is an amenable number.

284057317 is a deficient number, since it is larger than the sum of its proper divisors (1).

284057317 is an equidigital number, since it uses as much as digits as its factorization.

284057317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 284057317 is about 16854.0000296665. Note that the first 4 decimals coincide. The cubic root of 284057317 is about 657.3580619557.

The spelling of 284057317 in words is "two hundred eighty-four million, fifty-seven thousand, three hundred seventeen".