216466379 has 2 divisors, whose sum is σ = 216466380. Its totient is φ = 216466378.

The previous prime is 216466361. The next prime is 216466381. The reversal of 216466379 is 973664612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216466379 - 2⁸ = 216466123 is a prime.

Together with 216466381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216466309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108233189 + 108233190.

It is an arithmetic number, because the mean of its divisors is an integer number (108233190).

Almost surely, 2^216466379 is an apocalyptic number.

216466379 is a deficient number, since it is larger than the sum of its proper divisors (1).

216466379 is an equidigital number, since it uses as much as digits as its factorization.

216466379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 44.

The square root of 216466379 is about 14712.7964371155. The cubic root of 216466379 is about 600.4315219810.

The spelling of 216466379 in words is "two hundred sixteen million, four hundred sixty-six thousand, three hundred seventy-nine".