11944813 has 2 divisors, whose sum is σ = 11944814. Its totient is φ = 11944812.

The previous prime is 11944811. The next prime is 11944819. The reversal of 11944813 is 31844911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9132484 + 2812329 = 3022^2 + 1677^2 .

It is a cyclic number.

It is not a de Polignac number, because 11944813 - 2¹ = 11944811 is a prime.

Together with 11944811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11944811) 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 as a sum of consecutive naturals, namely, 5972406 + 5972407.

It is an arithmetic number, because the mean of its divisors is an integer number (5972407).

Almost surely, 2^11944813 is an apocalyptic number.

It is an amenable number.

11944813 is a deficient number, since it is larger than the sum of its proper divisors (1).

11944813 is an equidigital number, since it uses as much as digits as its factorization.

11944813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 11944813 is about 3456.1268784580. The cubic root of 11944813 is about 228.5913460880.

The spelling of 11944813 in words is "eleven million, nine hundred forty-four thousand, eight hundred thirteen".