8479013909 has 4 divisors (see below), whose sum is σ = 8479307916. Its totient is φ = 8478719904.

The previous prime is 8479013861. The next prime is 8479013911. The reversal of 8479013909 is 9093109748.

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 6193217809 + 2285796100 = 78697^2 + 47810^2 .

It is a cyclic number.

It is not a de Polignac number, because 8479013909 - 2²⁰ = 8477965333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8479013009) 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, 98384 + ... + 163209.

It is an arithmetic number, because the mean of its divisors is an integer number (2119826979).

Almost surely, 2^8479013909 is an apocalyptic number.

It is an amenable number.

8479013909 is a deficient number, since it is larger than the sum of its proper divisors (294007).

8479013909 is a wasteful number, since it uses less digits than its factorization.

8479013909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294006.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 8479013909 is about 92081.5611781208. The cubic root of 8479013909 is about 2039.1465984606.

The spelling of 8479013909 in words is "eight billion, four hundred seventy-nine million, thirteen thousand, nine hundred nine".