12636013 has 4 divisors (see below), whose sum is σ = 13608028. Its totient is φ = 11664000.

The previous prime is 12635989. The next prime is 12636017. The reversal of 12636013 is 31063621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31063621 = 229 ⋅135649.

It can be written as a sum of positive squares in 2 ways, for example, as 5442889 + 7193124 = 2333^2 + 2682^2 .

It is a cyclic number.

It is not a de Polignac number, because 12636013 - 2¹⁷ = 12504941 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 (12636017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485988 + ... + 486013.

It is an arithmetic number, because the mean of its divisors is an integer number (3402007).

Almost surely, 2^12636013 is an apocalyptic number.

12636013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12636013 is a deficient number, since it is larger than the sum of its proper divisors (972015).

12636013 is an equidigital number, since it uses as much as digits as its factorization.

12636013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972014.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 12636013 is about 3554.7170070204. The cubic root of 12636013 is about 232.9181621755.

Adding to 12636013 its reverse (31063621), we get a palindrome (43699634).

The spelling of 12636013 in words is "twelve million, six hundred thirty-six thousand, thirteen".