3247985021 has 2 divisors, whose sum is σ = 3247985022. Its totient is φ = 3247985020.

The previous prime is 3247985003. The next prime is 3247985033. The reversal of 3247985021 is 1205897423.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2773180921 + 474804100 = 52661^2 + 21790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3247985021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3247985021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3247985621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1623992510 + 1623992511.

It is an arithmetic number, because the mean of its divisors is an integer number (1623992511).

Almost surely, 2^3247985021 is an apocalyptic number.

It is an amenable number.

3247985021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3247985021 is an equidigital number, since it uses as much as digits as its factorization.

3247985021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 3247985021 is about 56991.0959799862. The cubic root of 3247985021 is about 1480.9418495141.

The spelling of 3247985021 in words is "three billion, two hundred forty-seven million, nine hundred eighty-five thousand, twenty-one".