216789193 has 8 divisors (see below), whose sum is σ = 219830400. Its totient is φ = 213755568.

The previous prime is 216789143. The next prime is 216789217. The reversal of 216789193 is 391987612.

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 216789193 - 2²¹ = 214692041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216789103) 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, 79155 + ... + 81847.

It is an arithmetic number, because the mean of its divisors is an integer number (27478800).

Almost surely, 2^216789193 is an apocalyptic number.

It is an amenable number.

216789193 is a deficient number, since it is larger than the sum of its proper divisors (3041207).

216789193 is a wasteful number, since it uses less digits than its factorization.

216789193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791.

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

The square root of 216789193 is about 14723.7628682345. The cubic root of 216789193 is about 600.7298461071.

The spelling of 216789193 in words is "two hundred sixteen million, seven hundred eighty-nine thousand, one hundred ninety-three".