216760289 has 2 divisors, whose sum is σ = 216760290. Its totient is φ = 216760288.

The previous prime is 216760273. The next prime is 216760321. The reversal of 216760289 is 982067612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184497889 + 32262400 = 13583^2 + 5680^2 .

It is a cyclic number.

It is not a de Polignac number, because 216760289 - 2⁴ = 216760273 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_11953949 and since 216760289 and 11953949 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (216760249) 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, 108380144 + 108380145.

It is an arithmetic number, because the mean of its divisors is an integer number (108380145).

Almost surely, 2^216760289 is an apocalyptic number.

It is an amenable number.

216760289 is a deficient number, since it is larger than the sum of its proper divisors (1).

216760289 is an equidigital number, since it uses as much as digits as its factorization.

216760289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 216760289 is about 14722.7812929487. The cubic root of 216760289 is about 600.7031469483.

The spelling of 216760289 in words is "two hundred sixteen million, seven hundred sixty thousand, two hundred eighty-nine".