13611137 has 4 divisors (see below), whose sum is σ = 13751556. Its totient is φ = 13470720.

The previous prime is 13611133. The next prime is 13611151. The reversal of 13611137 is 73111631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73111631 = 89 ⋅821479.

It can be written as a sum of positive squares in 2 ways, for example, as 8116801 + 5494336 = 2849^2 + 2344^2 .

It is a cyclic number.

It is not a de Polignac number, because 13611137 - 2² = 13611133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13611133) 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, 70064 + ... + 70257.

It is an arithmetic number, because the mean of its divisors is an integer number (3437889).

Almost surely, 2^13611137 is an apocalyptic number.

It is an amenable number.

13611137 is a deficient number, since it is larger than the sum of its proper divisors (140419).

13611137 is an equidigital number, since it uses as much as digits as its factorization.

13611137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140418.

The product of its digits is 378, while the sum is 23.

The square root of 13611137 is about 3689.3274454838. The cubic root of 13611137 is about 238.7617765999.

Adding to 13611137 its reverse (73111631), we get a palindrome (86722768).

The spelling of 13611137 in words is "thirteen million, six hundred eleven thousand, one hundred thirty-seven".