8478929 has 2 divisors, whose sum is σ = 8478930. Its totient is φ = 8478928.

The previous prime is 8478907. The next prime is 8478947. The reversal of 8478929 is 9298748.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5166529 + 3312400 = 2273^2 + 1820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8478929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8478989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4239464 + 4239465.

It is an arithmetic number, because the mean of its divisors is an integer number (4239465).

Almost surely, 2^8478929 is an apocalyptic number.

It is an amenable number.

8478929 is a deficient number, since it is larger than the sum of its proper divisors (1).

8478929 is an equidigital number, since it uses as much as digits as its factorization.

8478929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 47.

The square root of 8478929 is about 2911.8600584506. The cubic root of 8478929 is about 203.9139791754.

The spelling of 8478929 in words is "eight million, four hundred seventy-eight thousand, nine hundred twenty-nine".