8478897729 has 8 divisors (see below), whose sum is σ = 11496810720. Its totient is φ = 5556791616.

The previous prime is 8478897697. The next prime is 8478897731. The reversal of 8478897729 is 9277988748.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8478897729 - 2⁵ = 8478897697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8478897769) 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 in 7 ways as a sum of consecutive naturals, for example, 23951512 + ... + 23951865.

It is an arithmetic number, because the mean of its divisors is an integer number (1437101340).

Almost surely, 2^8478897729 is an apocalyptic number.

It is an amenable number.

8478897729 is a deficient number, since it is larger than the sum of its proper divisors (3017912991).

8478897729 is a wasteful number, since it uses less digits than its factorization.

8478897729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47903439.

The product of its digits is 113799168, while the sum is 69.

The square root of 8478897729 is about 92080.9303221899. The cubic root of 8478897729 is about 2039.1372849116.

The spelling of 8478897729 in words is "eight billion, four hundred seventy-eight million, eight hundred ninety-seven thousand, seven hundred twenty-nine".