13228717 has 2 divisors, whose sum is σ = 13228718. Its totient is φ = 13228716.

The previous prime is 13228687. The next prime is 13228741. The reversal of 13228717 is 71782231.

13228717 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10426441 + 2802276 = 3229^2 + 1674^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13228717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13228757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6614358 + 6614359.

It is an arithmetic number, because the mean of its divisors is an integer number (6614359).

Almost surely, 2^13228717 is an apocalyptic number.

It is an amenable number.

13228717 is a deficient number, since it is larger than the sum of its proper divisors (1).

13228717 is an equidigital number, since it uses as much as digits as its factorization.

13228717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 31.

The square root of 13228717 is about 3637.1303248578. The cubic root of 13228717 is about 236.5044092702.

The spelling of 13228717 in words is "thirteen million, two hundred twenty-eight thousand, seven hundred seventeen".