4720217309 has 2 divisors, whose sum is σ = 4720217310. Its totient is φ = 4720217308.

The previous prime is 4720217237. The next prime is 4720217321. The reversal of 4720217309 is 9037120274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4705548409 + 14668900 = 68597^2 + 3830^2 .

It is a cyclic number.

It is not a de Polignac number, because 4720217309 - 2¹² = 4720213213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4720217009) 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 as a sum of consecutive naturals, namely, 2360108654 + 2360108655.

It is an arithmetic number, because the mean of its divisors is an integer number (2360108655).

Almost surely, 2^4720217309 is an apocalyptic number.

It is an amenable number.

4720217309 is a deficient number, since it is larger than the sum of its proper divisors (1).

4720217309 is an equidigital number, since it uses as much as digits as its factorization.

4720217309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 4720217309 is about 68703.8376584598. The cubic root of 4720217309 is about 1677.4670480666.

The spelling of 4720217309 in words is "four billion, seven hundred twenty million, two hundred seventeen thousand, three hundred nine".