8429515217 has 2 divisors, whose sum is σ = 8429515218. Its totient is φ = 8429515216.

The previous prime is 8429515183. The next prime is 8429515223. The reversal of 8429515217 is 7125159248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8323095361 + 106419856 = 91231^2 + 10316^2 .

It is a cyclic number.

It is not a de Polignac number, because 8429515217 - 2¹² = 8429511121 is a prime.

It is not a weakly prime, because it can be changed into another prime (8429515517) 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, 4214757608 + 4214757609.

It is an arithmetic number, because the mean of its divisors is an integer number (4214757609).

Almost surely, 2^8429515217 is an apocalyptic number.

It is an amenable number.

8429515217 is a deficient number, since it is larger than the sum of its proper divisors (1).

8429515217 is an equidigital number, since it uses as much as digits as its factorization.

8429515217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 44.

The square root of 8429515217 is about 91812.3914131420. The cubic root of 8429515217 is about 2035.1708161122.

The spelling of 8429515217 in words is "eight billion, four hundred twenty-nine million, five hundred fifteen thousand, two hundred seventeen".