13641613 has 4 divisors (see below), whose sum is σ = 13865308. Its totient is φ = 13417920.

The previous prime is 13641557. The next prime is 13641623. The reversal of 13641613 is 31614631.

It is a happy number.

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 522729 + 13118884 = 723^2 + 3622^2 .

It is a cyclic number.

It is not a de Polignac number, because 13641613 - 2⁹ = 13641101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13641623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111756 + ... + 111877.

It is an arithmetic number, because the mean of its divisors is an integer number (3466327).

Almost surely, 2^13641613 is an apocalyptic number.

It is an amenable number.

13641613 is a deficient number, since it is larger than the sum of its proper divisors (223695).

13641613 is an equidigital number, since it uses as much as digits as its factorization.

13641613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223694.

The product of its digits is 1296, while the sum is 25.

The square root of 13641613 is about 3693.4554281865. The cubic root of 13641613 is about 238.9398435224.

The spelling of 13641613 in words is "thirteen million, six hundred forty-one thousand, six hundred thirteen".