8447479 has 4 divisors (see below), whose sum is σ = 8643976. Its totient is φ = 8250984.

The previous prime is 8447477. The next prime is 8447489. The reversal of 8447479 is 9747448.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 8447479 - 2¹ = 8447477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 196453 = 8447479 / (8 + 4 + 4 + 7 + 4 + 7 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8447471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98184 + ... + 98269.

It is an arithmetic number, because the mean of its divisors is an integer number (2160994).

Almost surely, 2^8447479 is an apocalyptic number.

8447479 is a deficient number, since it is larger than the sum of its proper divisors (196497).

8447479 is a wasteful number, since it uses less digits than its factorization.

8447479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196496.

The product of its digits is 225792, while the sum is 43.

The square root of 8447479 is about 2906.4547132202. The cubic root of 8447479 is about 203.6615479165.

The spelling of 8447479 in words is "eight million, four hundred forty-seven thousand, four hundred seventy-nine".