13613361 has 4 divisors (see below), whose sum is σ = 18151152. Its totient is φ = 9075572.

The previous prime is 13613357. The next prime is 13613393. The reversal of 13613361 is 16331631.

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 an emirpimes, since its reverse is a distinct semiprime: 16331631 = 3 ⋅5443877.

It is a cyclic number.

It is not a de Polignac number, because 13613361 - 2² = 13613357 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13613321) 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, 2268891 + ... + 2268896.

It is an arithmetic number, because the mean of its divisors is an integer number (4537788).

Almost surely, 2^13613361 is an apocalyptic number.

It is an amenable number.

13613361 is a deficient number, since it is larger than the sum of its proper divisors (4537791).

13613361 is an equidigital number, since it uses as much as digits as its factorization.

13613361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4537790.

The product of its digits is 972, while the sum is 24.

The square root of 13613361 is about 3689.6288431223. The cubic root of 13613361 is about 238.7747801002.

Adding to 13613361 its reverse (16331631), we get a palindrome (29944992).

The spelling of 13613361 in words is "thirteen million, six hundred thirteen thousand, three hundred sixty-one".