4788678217 has 2 divisors, whose sum is σ = 4788678218. Its totient is φ = 4788678216.

The previous prime is 4788678151. The next prime is 4788678227. The reversal of 4788678217 is 7128768874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3497066496 + 1291611721 = 59136^2 + 35939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4788678217 is a prime.

It is not a weakly prime, because it can be changed into another prime (4788678227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2394339108 + 2394339109.

It is an arithmetic number, because the mean of its divisors is an integer number (2394339109).

Almost surely, 2^4788678217 is an apocalyptic number.

It is an amenable number.

4788678217 is a deficient number, since it is larger than the sum of its proper divisors (1).

4788678217 is an equidigital number, since it uses as much as digits as its factorization.

4788678217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8429568, while the sum is 58.

The square root of 4788678217 is about 69200.2761338421. The cubic root of 4788678217 is about 1685.5380140271.

The spelling of 4788678217 in words is "four billion, seven hundred eighty-eight million, six hundred seventy-eight thousand, two hundred seventeen".