324340021 has 2 divisors, whose sum is σ = 324340022. Its totient is φ = 324340020.

The previous prime is 324339943. The next prime is 324340061. The reversal of 324340021 is 120043423.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319908996 + 4431025 = 17886^2 + 2105^2 .

It is a cyclic number.

It is not a de Polignac number, because 324340021 - 2¹³ = 324331829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (324340061) 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, 162170010 + 162170011.

It is an arithmetic number, because the mean of its divisors is an integer number (162170011).

Almost surely, 2^324340021 is an apocalyptic number.

It is an amenable number.

324340021 is a deficient number, since it is larger than the sum of its proper divisors (1).

324340021 is an equidigital number, since it uses as much as digits as its factorization.

324340021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 324340021 is about 18009.4425510619. The cubic root of 324340021 is about 687.0687250401.

Adding to 324340021 its reverse (120043423), we get a palindrome (444383444).

It can be divided in two parts, 3243 and 40021, that added together give a square (43264 = 208²).

The spelling of 324340021 in words is "three hundred twenty-four million, three hundred forty thousand, twenty-one".