216289693 has 8 divisors (see below), whose sum is σ = 222017760. Its totient is φ = 210630480.

The previous prime is 216289663. The next prime is 216289721. The reversal of 216289693 is 396982612.

216289693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216289693 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 (216289603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10818 + ... + 23443.

It is an arithmetic number, because the mean of its divisors is an integer number (27752220).

Almost surely, 2^216289693 is an apocalyptic number.

It is an amenable number.

216289693 is a deficient number, since it is larger than the sum of its proper divisors (5728067).

216289693 is a wasteful number, since it uses less digits than its factorization.

216289693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34427.

The product of its digits is 279936, while the sum is 46.

The square root of 216289693 is about 14706.7907104167. The cubic root of 216289693 is about 600.2681144325.

The spelling of 216289693 in words is "two hundred sixteen million, two hundred eighty-nine thousand, six hundred ninety-three".