216193789 has 8 divisors (see below), whose sum is σ = 248857280. Its totient is φ = 183974976.

The previous prime is 216193781. The next prime is 216193801. The reversal of 216193789 is 987391612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 216193789 - 2³ = 216193781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216193781) 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, 110124 + ... + 112069.

It is an arithmetic number, because the mean of its divisors is an integer number (31107160).

Almost surely, 2^216193789 is an apocalyptic number.

It is an amenable number.

216193789 is a deficient number, since it is larger than the sum of its proper divisors (32663491).

216193789 is a wasteful number, since it uses less digits than its factorization.

216193789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222339.

The product of its digits is 163296, while the sum is 46.

The square root of 216193789 is about 14703.5298142997. The cubic root of 216193789 is about 600.1793806249.

The spelling of 216193789 in words is "two hundred sixteen million, one hundred ninety-three thousand, seven hundred eighty-nine".