13721713 has 2 divisors, whose sum is σ = 13721714. Its totient is φ = 13721712.

The previous prime is 13721693. The next prime is 13721723. The reversal of 13721713 is 31712731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9345249 + 4376464 = 3057^2 + 2092^2 .

It is an emirp because it is prime and its reverse (31712731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13721713 - 2⁵ = 13721681 is a prime.

It is not a weakly prime, because it can be changed into another prime (13721723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6860856 + 6860857.

It is an arithmetic number, because the mean of its divisors is an integer number (6860857).

Almost surely, 2^13721713 is an apocalyptic number.

It is an amenable number.

13721713 is a deficient number, since it is larger than the sum of its proper divisors (1).

13721713 is an equidigital number, since it uses as much as digits as its factorization.

13721713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 882, while the sum is 25.

The square root of 13721713 is about 3704.2830615384. The cubic root of 13721713 is about 239.4065953473.

The spelling of 13721713 in words is "thirteen million, seven hundred twenty-one thousand, seven hundred thirteen".