13391617 has 4 divisors (see below), whose sum is σ = 13439556. Its totient is φ = 13343680.

The previous prime is 13391551. The next prime is 13391621. The reversal of 13391617 is 71619331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9585216 + 3806401 = 3096^2 + 1951^2 .

It is a cyclic number.

It is not a de Polignac number, because 13391617 - 2¹¹ = 13389569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13391687) 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, 23548 + ... + 24109.

It is an arithmetic number, because the mean of its divisors is an integer number (3359889).

Almost surely, 2^13391617 is an apocalyptic number.

It is an amenable number.

13391617 is a deficient number, since it is larger than the sum of its proper divisors (47939).

13391617 is an equidigital number, since it uses as much as digits as its factorization.

13391617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47938.

The product of its digits is 3402, while the sum is 31.

The square root of 13391617 is about 3659.4558338638. The cubic root of 13391617 is about 237.4712327114.

The spelling of 13391617 in words is "thirteen million, three hundred ninety-one thousand, six hundred seventeen".