8478429 has 4 divisors (see below), whose sum is σ = 11304576. Its totient is φ = 5652284.

The previous prime is 8478391. The next prime is 8478433. The reversal of 8478429 is 9248748.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8478429 - 2¹³ = 8470237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8478629) 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, 1413069 + ... + 1413074.

It is an arithmetic number, because the mean of its divisors is an integer number (2826144).

Almost surely, 2^8478429 is an apocalyptic number.

It is an amenable number.

8478429 is a deficient number, since it is larger than the sum of its proper divisors (2826147).

8478429 is a wasteful number, since it uses less digits than its factorization.

8478429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2826146.

The product of its digits is 129024, while the sum is 42.

The square root of 8478429 is about 2911.7742014105. The cubic root of 8478429 is about 203.9099708471.

The spelling of 8478429 in words is "eight million, four hundred seventy-eight thousand, four hundred twenty-nine".