11821853 has 2 divisors, whose sum is σ = 11821854. Its totient is φ = 11821852.

The previous prime is 11821847. The next prime is 11821871. The reversal of 11821853 is 35812811.

11821853 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11682724 + 139129 = 3418^2 + 373^2 .

It is a cyclic number.

It is not a de Polignac number, because 11821853 - 2²² = 7627549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11821883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5910926 + 5910927.

It is an arithmetic number, because the mean of its divisors is an integer number (5910927).

Almost surely, 2^11821853 is an apocalyptic number.

It is an amenable number.

11821853 is a deficient number, since it is larger than the sum of its proper divisors (1).

11821853 is an equidigital number, since it uses as much as digits as its factorization.

11821853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 29.

The square root of 11821853 is about 3438.2921632694. The cubic root of 11821853 is about 227.8042654283.

The spelling of 11821853 in words is "eleven million, eight hundred twenty-one thousand, eight hundred fifty-three".