13521617 has 2 divisors, whose sum is σ = 13521618. Its totient is φ = 13521616.

The previous prime is 13521593. The next prime is 13521637. The reversal of 13521617 is 71612531.

13521617 is digitally balanced in base 2, 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., 13424896 + 96721 = 3664^2 + 311^2 .

It is a cyclic number.

It is not a de Polignac number, because 13521617 - 2¹² = 13517521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13521637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760808 + 6760809.

It is an arithmetic number, because the mean of its divisors is an integer number (6760809).

Almost surely, 2^13521617 is an apocalyptic number.

It is an amenable number.

13521617 is a deficient number, since it is larger than the sum of its proper divisors (1).

13521617 is an equidigital number, since it uses as much as digits as its factorization.

13521617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 26.

The square root of 13521617 is about 3677.1751386084. The cubic root of 13521617 is about 238.2371820514.

The spelling of 13521617 in words is "thirteen million, five hundred twenty-one thousand, six hundred seventeen".