13530817 has 4 divisors (see below), whose sum is σ = 13562500. Its totient is φ = 13499136.

The previous prime is 13530809. The next prime is 13530823. The reversal of 13530817 is 71803531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71803531 = 59 ⋅1217009.

It can be written as a sum of positive squares in 2 ways, for example, as 4822416 + 8708401 = 2196^2 + 2951^2 .

It is a cyclic number.

It is not a de Polignac number, because 13530817 - 2³ = 13530809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13530857) 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 in 3 ways as a sum of consecutive naturals, for example, 15192 + ... + 16057.

It is an arithmetic number, because the mean of its divisors is an integer number (3390625).

Almost surely, 2^13530817 is an apocalyptic number.

It is an amenable number.

13530817 is a deficient number, since it is larger than the sum of its proper divisors (31683).

13530817 is an equidigital number, since it uses as much as digits as its factorization.

13530817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31682.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 13530817 is about 3678.4258861638. The cubic root of 13530817 is about 238.2912013592.

The spelling of 13530817 in words is "thirteen million, five hundred thirty thousand, eight hundred seventeen".