13709617 has 4 divisors (see below), whose sum is σ = 13720356. Its totient is φ = 13698880.

The previous prime is 13709611. The next prime is 13709627. The reversal of 13709617 is 71690731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2944656 + 10764961 = 1716^2 + 3281^2 .

It is a cyclic number.

It is not a de Polignac number, because 13709617 - 2²³ = 5321009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13709611) 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, 3148 + ... + 6109.

It is an arithmetic number, because the mean of its divisors is an integer number (3430089).

Almost surely, 2^13709617 is an apocalyptic number.

It is an amenable number.

13709617 is a deficient number, since it is larger than the sum of its proper divisors (10739).

13709617 is an equidigital number, since it uses as much as digits as its factorization.

13709617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10738.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 13709617 is about 3702.6499969616. The cubic root of 13709617 is about 239.3362272255.

The spelling of 13709617 in words is "thirteen million, seven hundred nine thousand, six hundred seventeen".