13821853 has 2 divisors, whose sum is σ = 13821854. Its totient is φ = 13821852.

The previous prime is 13821839. The next prime is 13821869. The reversal of 13821853 is 35812831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9078169 + 4743684 = 3013^2 + 2178^2 .

It is an emirp because it is prime and its reverse (35812831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13821853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13821823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6910926 + 6910927.

It is an arithmetic number, because the mean of its divisors is an integer number (6910927).

Almost surely, 2^13821853 is an apocalyptic number.

It is an amenable number.

13821853 is a deficient number, since it is larger than the sum of its proper divisors (1).

13821853 is an equidigital number, since it uses as much as digits as its factorization.

13821853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 31.

The square root of 13821853 is about 3717.7752756185. The cubic root of 13821853 is about 239.9875745882.

The spelling of 13821853 in words is "thirteen million, eight hundred twenty-one thousand, eight hundred fifty-three".