13216393 has 4 divisors (see below), whose sum is σ = 13224708. Its totient is φ = 13208080.

The previous prime is 13216387. The next prime is 13216397. The reversal of 13216393 is 39361231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5774409 + 7441984 = 2403^2 + 2728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13216393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13216397) 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, 946 + ... + 5227.

It is an arithmetic number, because the mean of its divisors is an integer number (3306177).

Almost surely, 2^13216393 is an apocalyptic number.

It is an amenable number.

13216393 is a deficient number, since it is larger than the sum of its proper divisors (8315).

13216393 is an equidigital number, since it uses as much as digits as its factorization.

13216393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8314.

The product of its digits is 2916, while the sum is 28.

The square root of 13216393 is about 3635.4357372948. The cubic root of 13216393 is about 236.4309431907.

The spelling of 13216393 in words is "thirteen million, two hundred sixteen thousand, three hundred ninety-three".