13821449 has 2 divisors, whose sum is σ = 13821450. Its totient is φ = 13821448.

The previous prime is 13821427. The next prime is 13821463. The reversal of 13821449 is 94412831.

It is a happy number.

13821449 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10465225 + 3356224 = 3235^2 + 1832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13821449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13821649) 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 as a sum of consecutive naturals, namely, 6910724 + 6910725.

It is an arithmetic number, because the mean of its divisors is an integer number (6910725).

Almost surely, 2^13821449 is an apocalyptic number.

It is an amenable number.

13821449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13821449 is an equidigital number, since it uses as much as digits as its factorization.

13821449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 13821449 is about 3717.7209416523. The cubic root of 13821449 is about 239.9852363603.

The spelling of 13821449 in words is "thirteen million, eight hundred twenty-one thousand, four hundred forty-nine".