12180913 has 2 divisors, whose sum is σ = 12180914. Its totient is φ = 12180912.

The previous prime is 12180901. The next prime is 12180947. The reversal of 12180913 is 31908121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10419984 + 1760929 = 3228^2 + 1327^2 .

It is a cyclic number.

It is not a de Polignac number, because 12180913 - 2⁹ = 12180401 is a prime.

It is not a weakly prime, because it can be changed into another prime (12180983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6090456 + 6090457.

It is an arithmetic number, because the mean of its divisors is an integer number (6090457).

Almost surely, 2^12180913 is an apocalyptic number.

It is an amenable number.

12180913 is a deficient number, since it is larger than the sum of its proper divisors (1).

12180913 is an equidigital number, since it uses as much as digits as its factorization.

12180913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 12180913 is about 3490.1164737011. The cubic root of 12180913 is about 230.0876351618.

The spelling of 12180913 in words is "twelve million, one hundred eighty thousand, nine hundred thirteen".