8478813217 has 32 divisors (see below), whose sum is σ = 9962929152. Its totient is φ = 7066471104.

The previous prime is 8478813209. The next prime is 8478813221. The reversal of 8478813217 is 7123188748.

It is not a de Polignac number, because 8478813217 - 2³ = 8478813209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8478813247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15059778 + ... + 15060340.

It is an arithmetic number, because the mean of its divisors is an integer number (311341536).

Almost surely, 2^8478813217 is an apocalyptic number.

It is an amenable number.

8478813217 is a deficient number, since it is larger than the sum of its proper divisors (1484115935).

8478813217 is a wasteful number, since it uses less digits than its factorization.

8478813217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997.

The product of its digits is 602112, while the sum is 49.

The square root of 8478813217 is about 92080.4714203832. The cubic root of 8478813217 is about 2039.1305099688.

The spelling of 8478813217 in words is "eight billion, four hundred seventy-eight million, eight hundred thirteen thousand, two hundred seventeen".