847479 has 4 divisors (see below), whose sum is σ = 1129976. Its totient is φ = 564984.

The previous prime is 847477. The next prime is 847493. The reversal of 847479 is 974748.

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

It is not a de Polignac number, because 847479 - 2¹ = 847477 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 847479.

It is not an unprimeable number, because it can be changed into a prime (847477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141244 + ... + 141249.

It is an arithmetic number, because the mean of its divisors is an integer number (282494).

2⁸⁴⁷⁴⁷⁹ is an apocalyptic number.

847479 is a deficient number, since it is larger than the sum of its proper divisors (282497).

847479 is a wasteful number, since it uses less digits than its factorization.

847479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282496.

The product of its digits is 56448, while the sum is 39.

The square root of 847479 is about 920.5862262711. The cubic root of 847479 is about 94.6330814430.

It can be divided in two parts, 847 and 479, that added together give a triangular number (1326 = T₅₁).

The spelling of 847479 in words is "eight hundred forty-seven thousand, four hundred seventy-nine".