216784327 has 2 divisors, whose sum is σ = 216784328. Its totient is φ = 216784326.

The previous prime is 216784313. The next prime is 216784417. The reversal of 216784327 is 723487612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216784327 - 2¹⁵ = 216751559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216784327.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216734327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108392163 + 108392164.

It is an arithmetic number, because the mean of its divisors is an integer number (108392164).

Almost surely, 2^216784327 is an apocalyptic number.

216784327 is a deficient number, since it is larger than the sum of its proper divisors (1).

216784327 is an equidigital number, since it uses as much as digits as its factorization.

216784327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 40.

The square root of 216784327 is about 14723.5976242221. The cubic root of 216784327 is about 600.7253514591.

The spelling of 216784327 in words is "two hundred sixteen million, seven hundred eighty-four thousand, three hundred twenty-seven".