8479447913 has 4 divisors (see below), whose sum is σ = 8485285188. Its totient is φ = 8473610640.

The previous prime is 8479447903. The next prime is 8479447931. The reversal of 8479447913 is 3197449748.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5454117904 + 3025330009 = 73852^2 + 55003^2 .

It is a cyclic number.

It is not a de Polignac number, because 8479447913 - 2⁴ = 8479447897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8479447903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2916458 + ... + 2919363.

It is an arithmetic number, because the mean of its divisors is an integer number (2121321297).

Almost surely, 2^8479447913 is an apocalyptic number.

It is an amenable number.

8479447913 is a deficient number, since it is larger than the sum of its proper divisors (5837275).

8479447913 is a wasteful number, since it uses less digits than its factorization.

8479447913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5837274.

The product of its digits is 6096384, while the sum is 56.

The square root of 8479447913 is about 92083.9177761242. The cubic root of 8479447913 is about 2039.1813895613.

The spelling of 8479447913 in words is "eight billion, four hundred seventy-nine million, four hundred forty-seven thousand, nine hundred thirteen".