216799123 has 8 divisors (see below), whose sum is σ = 220083696. Its totient is φ = 213523200.

The previous prime is 216799111. The next prime is 216799129. The reversal of 216799123 is 321997612.

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 216799123 - 2¹⁷ = 216668051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216799129) 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, 62628 + ... + 65998.

It is an arithmetic number, because the mean of its divisors is an integer number (27510462).

Almost surely, 2^216799123 is an apocalyptic number.

216799123 is a deficient number, since it is larger than the sum of its proper divisors (3284573).

216799123 is an equidigital number, since it uses as much as digits as its factorization.

216799123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4325.

The product of its digits is 40824, while the sum is 40.

The square root of 216799123 is about 14724.1000743679. The cubic root of 216799123 is about 600.7390180838.

The spelling of 216799123 in words is "two hundred sixteen million, seven hundred ninety-nine thousand, one hundred twenty-three".