216714389 has 2 divisors, whose sum is σ = 216714390. Its totient is φ = 216714388.

The previous prime is 216714373. The next prime is 216714413. The reversal of 216714389 is 983417612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120340900 + 96373489 = 10970^2 + 9817^2 .

It is a cyclic number.

It is not a de Polignac number, because 216714389 - 2⁴ = 216714373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216714359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108357194 + 108357195.

It is an arithmetic number, because the mean of its divisors is an integer number (108357195).

Almost surely, 2^216714389 is an apocalyptic number.

It is an amenable number.

216714389 is a deficient number, since it is larger than the sum of its proper divisors (1).

216714389 is an equidigital number, since it uses as much as digits as its factorization.

216714389 is an odious number, because the sum of its binary digits is odd.

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

The square root of 216714389 is about 14721.2224016893. Note that the first 3 decimals coincide. The cubic root of 216714389 is about 600.6607433928.

The spelling of 216714389 in words is "two hundred sixteen million, seven hundred fourteen thousand, three hundred eighty-nine".