216694 has 4 divisors (see below), whose sum is σ = 325044. Its totient is φ = 108346.

The previous prime is 216679. The next prime is 216703. The reversal of 216694 is 496612.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 54172 + ... + 54175.

It is an arithmetic number, because the mean of its divisors is an integer number (81261).

2²¹⁶⁶⁹⁴ is an apocalyptic number.

216694 is a deficient number, since it is larger than the sum of its proper divisors (108350).

216694 is a wasteful number, since it uses less digits than its factorization.

216694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108349.

The product of its digits is 2592, while the sum is 28.

The square root of 216694 is about 465.5040279095. The cubic root of 216694 is about 60.0641905610.

The spelling of 216694 in words is "two hundred sixteen thousand, six hundred ninety-four".