216873383 has 2 divisors, whose sum is σ = 216873384. Its totient is φ = 216873382.

The previous prime is 216873379. The next prime is 216873389. The reversal of 216873383 is 383378612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216873383 - 2² = 216873379 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216873383.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216873389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108436691 + 108436692.

It is an arithmetic number, because the mean of its divisors is an integer number (108436692).

Almost surely, 2^216873383 is an apocalyptic number.

216873383 is a deficient number, since it is larger than the sum of its proper divisors (1).

216873383 is an equidigital number, since it uses as much as digits as its factorization.

216873383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 216873383 is about 14726.6215745499. The cubic root of 216873383 is about 600.8076004445.

The spelling of 216873383 in words is "two hundred sixteen million, eight hundred seventy-three thousand, three hundred eighty-three".