13961617 has 8 divisors (see below), whose sum is σ = 14389992. Its totient is φ = 13536000.

The previous prime is 13961603. The next prime is 13961639. The reversal of 13961617 is 71616931.

It can be written as a sum of positive squares in 4 ways, for example, as 10182481 + 3779136 = 3191^2 + 1944^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13961617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13961657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14367 + ... + 15307.

It is an arithmetic number, because the mean of its divisors is an integer number (1798749).

Almost surely, 2^13961617 is an apocalyptic number.

It is an amenable number.

13961617 is a deficient number, since it is larger than the sum of its proper divisors (428375).

13961617 is an equidigital number, since it uses as much as digits as its factorization.

13961617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379.

The product of its digits is 6804, while the sum is 34.

The square root of 13961617 is about 3736.5247222519. The cubic root of 13961617 is about 240.7937665097.

The spelling of 13961617 in words is "thirteen million, nine hundred sixty-one thousand, six hundred seventeen".