216984127 has 2 divisors, whose sum is σ = 216984128. Its totient is φ = 216984126.

The previous prime is 216984083. The next prime is 216984191. The reversal of 216984127 is 721489612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216984127 - 2⁷ = 216983999 is a prime.

It is a super-2 number, since 2×216984127² = 94164222739904258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216984127.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216984197) 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, 108492063 + 108492064.

It is an arithmetic number, because the mean of its divisors is an integer number (108492064).

Almost surely, 2^216984127 is an apocalyptic number.

216984127 is a deficient number, since it is larger than the sum of its proper divisors (1).

216984127 is an equidigital number, since it uses as much as digits as its factorization.

216984127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 216984127 is about 14730.3810880778. The cubic root of 216984127 is about 600.9098482998.

The spelling of 216984127 in words is "two hundred sixteen million, nine hundred eighty-four thousand, one hundred twenty-seven".