13505617 has 4 divisors (see below), whose sum is σ = 13515840. Its totient is φ = 13495396.

The previous prime is 13505593. The next prime is 13505641. The reversal of 13505617 is 71650531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 71650531 = 5923 ⋅12097.

It is an interprime number because it is at equal distance from previous prime (13505593) and next prime (13505641).

It is a cyclic number.

It is not a de Polignac number, because 13505617 - 2¹⁹ = 12981329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13505717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2773 + ... + 5890.

It is an arithmetic number, because the mean of its divisors is an integer number (3378960).

Almost surely, 2^13505617 is an apocalyptic number.

It is an amenable number.

13505617 is a deficient number, since it is larger than the sum of its proper divisors (10223).

13505617 is an equidigital number, since it uses as much as digits as its factorization.

13505617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10222.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 13505617 is about 3674.9989115645. The cubic root of 13505617 is about 238.1431770373.

The spelling of 13505617 in words is "thirteen million, five hundred five thousand, six hundred seventeen".