13216997 has 2 divisors, whose sum is σ = 13216998. Its totient is φ = 13216996.

The previous prime is 13216993. The next prime is 13216999. The reversal of 13216997 is 79961231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12952801 + 264196 = 3599^2 + 514^2 .

It is a cyclic number.

It is not a de Polignac number, because 13216997 - 2² = 13216993 is a prime.

Together with 13216999, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13216997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13216991) 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 as a sum of consecutive naturals, namely, 6608498 + 6608499.

It is an arithmetic number, because the mean of its divisors is an integer number (6608499).

Almost surely, 2^13216997 is an apocalyptic number.

It is an amenable number.

13216997 is a deficient number, since it is larger than the sum of its proper divisors (1).

13216997 is an equidigital number, since it uses as much as digits as its factorization.

13216997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 38.

The square root of 13216997 is about 3635.5188075432. The cubic root of 13216997 is about 236.4345448318.

The spelling of 13216997 in words is "thirteen million, two hundred sixteen thousand, nine hundred ninety-seven".