13206617 has 4 divisors (see below), whose sum is σ = 13214736. Its totient is φ = 13198500.

The previous prime is 13206607. The next prime is 13206631. The reversal of 13206617 is 71660231.

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.

It is a cyclic number.

It is not a de Polignac number, because 13206617 - 2⁴ = 13206601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13206607) 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, 683 + ... + 5184.

It is an arithmetic number, because the mean of its divisors is an integer number (3303684).

Almost surely, 2^13206617 is an apocalyptic number.

It is an amenable number.

13206617 is a deficient number, since it is larger than the sum of its proper divisors (8119).

13206617 is an equidigital number, since it uses as much as digits as its factorization.

13206617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8118.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 13206617 is about 3634.0909454773. The cubic root of 13206617 is about 236.3726338112.

Adding to 13206617 its reverse (71660231), we get a palindrome (84866848).

The spelling of 13206617 in words is "thirteen million, two hundred six thousand, six hundred seventeen".