13493521 has 2 divisors, whose sum is σ = 13493522. Its totient is φ = 13493520.

The previous prime is 13493453. The next prime is 13493531. The reversal of 13493521 is 12539431.

13493521 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., 12327121 + 1166400 = 3511^2 + 1080^2 .

It is a cyclic number.

It is not a de Polignac number, because 13493521 - 2¹⁷ = 13362449 is a prime.

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 13493521.

It is not a weakly prime, because it can be changed into another prime (13493531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6746760 + 6746761.

It is an arithmetic number, because the mean of its divisors is an integer number (6746761).

Almost surely, 2^13493521 is an apocalyptic number.

It is an amenable number.

13493521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13493521 is an equidigital number, since it uses as much as digits as its factorization.

13493521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 13493521 is about 3673.3528281394. The cubic root of 13493521 is about 238.0720599539.

The spelling of 13493521 in words is "thirteen million, four hundred ninety-three thousand, five hundred twenty-one".