13216899 has 4 divisors (see below), whose sum is σ = 17622536. Its totient is φ = 8811264.

The previous prime is 13216873. The next prime is 13216901. The reversal of 13216899 is 99861231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99861231 = 3 ⋅33287077.

It is not a de Polignac number, because 13216899 - 2⁹ = 13216387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13216699) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2202814 + ... + 2202819.

It is an arithmetic number, because the mean of its divisors is an integer number (4405634).

Almost surely, 2^13216899 is an apocalyptic number.

13216899 is a deficient number, since it is larger than the sum of its proper divisors (4405637).

13216899 is an equidigital number, since it uses as much as digits as its factorization.

13216899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4405636.

The product of its digits is 23328, while the sum is 39.

The square root of 13216899 is about 3635.5053293868. The cubic root of 13216899 is about 236.4339604671.

The spelling of 13216899 in words is "thirteen million, two hundred sixteen thousand, eight hundred ninety-nine".