13721297 has 2 divisors, whose sum is σ = 13721298. Its totient is φ = 13721296.

The previous prime is 13721291. The next prime is 13721303. The reversal of 13721297 is 79212731.

13721297 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (13721291) and next prime (13721303).

It can be written as a sum of positive squares in only one way, i.e., 13719616 + 1681 = 3704^2 + 41^2 .

It is a cyclic number.

It is not a de Polignac number, because 13721297 - 2⁶ = 13721233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13721291) 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, 6860648 + 6860649.

It is an arithmetic number, because the mean of its divisors is an integer number (6860649).

Almost surely, 2^13721297 is an apocalyptic number.

It is an amenable number.

13721297 is a deficient number, since it is larger than the sum of its proper divisors (1).

13721297 is an equidigital number, since it uses as much as digits as its factorization.

13721297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 32.

The square root of 13721297 is about 3704.2269098963. The cubic root of 13721297 is about 239.4041759664.

The spelling of 13721297 in words is "thirteen million, seven hundred twenty-one thousand, two hundred ninety-seven".