216793 has 4 divisors (see below), whose sum is σ = 217728. Its totient is φ = 215860.

The previous prime is 216791. The next prime is 216803. The reversal of 216793 is 397612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 216793 - 2¹ = 216791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180 + ... + 682.

It is an arithmetic number, because the mean of its divisors is an integer number (54432).

2²¹⁶⁷⁹³ is an apocalyptic number.

It is an amenable number.

216793 is a deficient number, since it is larger than the sum of its proper divisors (935).

216793 is an equidigital number, since it uses as much as digits as its factorization.

216793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934.

The product of its digits is 2268, while the sum is 28.

The square root of 216793 is about 465.6103521186. The cubic root of 216793 is about 60.0733362526.

The spelling of 216793 in words is "two hundred sixteen thousand, seven hundred ninety-three".