8478947 has 2 divisors, whose sum is σ = 8478948. Its totient is φ = 8478946.

The previous prime is 8478929. The next prime is 8478961. The reversal of 8478947 is 7498748.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8478947 - 2¹⁶ = 8413411 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8478907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4239473 + 4239474.

It is an arithmetic number, because the mean of its divisors is an integer number (4239474).

Almost surely, 2^8478947 is an apocalyptic number.

8478947 is a deficient number, since it is larger than the sum of its proper divisors (1).

8478947 is an equidigital number, since it uses as much as digits as its factorization.

8478947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 47.

The square root of 8478947 is about 2911.8631492568. The cubic root of 8478947 is about 203.9141234723.

The spelling of 8478947 in words is "eight million, four hundred seventy-eight thousand, nine hundred forty-seven".