12821933 has 2 divisors, whose sum is σ = 12821934. Its totient is φ = 12821932.

The previous prime is 12821899. The next prime is 12821953. The reversal of 12821933 is 33912821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11377129 + 1444804 = 3373^2 + 1202^2 .

It is an emirp because it is prime and its reverse (33912821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12821933 - 2¹⁰ = 12820909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12821896 and 12821905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12821953) 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, 6410966 + 6410967.

It is an arithmetic number, because the mean of its divisors is an integer number (6410967).

Almost surely, 2^12821933 is an apocalyptic number.

It is an amenable number.

12821933 is a deficient number, since it is larger than the sum of its proper divisors (1).

12821933 is an equidigital number, since it uses as much as digits as its factorization.

12821933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 12821933 is about 3580.7726819780. The cubic root of 12821933 is about 234.0549521512.

The spelling of 12821933 in words is "twelve million, eight hundred twenty-one thousand, nine hundred thirty-three".