3240639361 has 2 divisors, whose sum is σ = 3240639362. Its totient is φ = 3240639360.

The previous prime is 3240639313. The next prime is 3240639371. The reversal of 3240639361 is 1639360423.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2819610000 + 421029361 = 53100^2 + 20519^2 .

It is a cyclic number.

It is not a de Polignac number, because 3240639361 - 2¹¹ = 3240637313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3240639361.

It is not a weakly prime, because it can be changed into another prime (3240639371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1620319680 + 1620319681.

It is an arithmetic number, because the mean of its divisors is an integer number (1620319681).

Almost surely, 2^3240639361 is an apocalyptic number.

It is an amenable number.

3240639361 is a deficient number, since it is larger than the sum of its proper divisors (1).

3240639361 is an equidigital number, since it uses as much as digits as its factorization.

3240639361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 37.

The square root of 3240639361 is about 56926.6138198997. The cubic root of 3240639361 is about 1479.8245715187.

Adding to 3240639361 its reverse (1639360423), we get a palindrome (4879999784).

The spelling of 3240639361 in words is "three billion, two hundred forty million, six hundred thirty-nine thousand, three hundred sixty-one".