3243240657 has 6 divisors (see below), whose sum is σ = 4684680962. Its totient is φ = 2162160432.

The previous prime is 3243240653. The next prime is 3243240673. The reversal of 3243240657 is 7560423423.

3243240657 is a `hidden beast` number, since 3 + 243 + 2 + 406 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2696101776 + 547138881 = 51924^2 + 23391^2 .

It is not a de Polignac number, because 3243240657 - 2² = 3243240653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3243240653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 180180028 + ... + 180180045.

Almost surely, 2^3243240657 is an apocalyptic number.

It is an amenable number.

3243240657 is a deficient number, since it is larger than the sum of its proper divisors (1441440305).

3243240657 is a wasteful number, since it uses less digits than its factorization.

3243240657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360360079 (or 360360076 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 36.

The square root of 3243240657 is about 56949.4570386760. The cubic root of 3243240657 is about 1480.2204226423.

The spelling of 3243240657 in words is "three billion, two hundred forty-three million, two hundred forty thousand, six hundred fifty-seven".