216923359 has 2 divisors, whose sum is σ = 216923360. Its totient is φ = 216923358.

The previous prime is 216923351. The next prime is 216923387. The reversal of 216923359 is 953329612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216923359 - 2³ = 216923351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216923351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108461679 + 108461680.

It is an arithmetic number, because the mean of its divisors is an integer number (108461680).

Almost surely, 2^216923359 is an apocalyptic number.

216923359 is a deficient number, since it is larger than the sum of its proper divisors (1).

216923359 is an equidigital number, since it uses as much as digits as its factorization.

216923359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 40.

The square root of 216923359 is about 14728.3182678811. The cubic root of 216923359 is about 600.8537466553.

The spelling of 216923359 in words is "two hundred sixteen million, nine hundred twenty-three thousand, three hundred fifty-nine".