3243280921 has 4 divisors (see below), whose sum is σ = 3244077412. Its totient is φ = 3242484432.

The previous prime is 3243280903. The next prime is 3243280967. The reversal of 3243280921 is 1290823423.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1921594896 + 1321686025 = 43836^2 + 36355^2 .

It is a cyclic number.

It is not a de Polignac number, because 3243280921 - 2⁵ = 3243280889 is a prime.

It is a super-2 number, since 2×3243280921² = 21037742265045216482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3243280321) 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 in 3 ways as a sum of consecutive naturals, for example, 392106 + ... + 400291.

It is an arithmetic number, because the mean of its divisors is an integer number (811019353).

Almost surely, 2^3243280921 is an apocalyptic number.

It is an amenable number.

3243280921 is a deficient number, since it is larger than the sum of its proper divisors (796491).

3243280921 is an equidigital number, since it uses as much as digits as its factorization.

3243280921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796490.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 3243280921 is about 56949.8105440220. The cubic root of 3243280921 is about 1480.2265481357.

The spelling of 3243280921 in words is "three billion, two hundred forty-three million, two hundred eighty thousand, nine hundred twenty-one".