13216737 has 4 divisors (see below), whose sum is σ = 17622320. Its totient is φ = 8811156.

The previous prime is 13216727. The next prime is 13216741. The reversal of 13216737 is 73761231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13216737 - 2⁸ = 13216481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13216727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2202787 + ... + 2202792.

It is an arithmetic number, because the mean of its divisors is an integer number (4405580).

Almost surely, 2^13216737 is an apocalyptic number.

It is an amenable number.

13216737 is a deficient number, since it is larger than the sum of its proper divisors (4405583).

13216737 is an equidigital number, since it uses as much as digits as its factorization.

13216737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4405582.

The product of its digits is 5292, while the sum is 30.

The square root of 13216737 is about 3635.4830490596. The cubic root of 13216737 is about 236.4329944700.

Adding to 13216737 its reverse (73761231), we get a palindrome (86977968).

The spelling of 13216737 in words is "thirteen million, two hundred sixteen thousand, seven hundred thirty-seven".