8478149 has 2 divisors, whose sum is σ = 8478150. Its totient is φ = 8478148.

The previous prime is 8478137. The next prime is 8478163. The reversal of 8478149 is 9418748.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8305924 + 172225 = 2882^2 + 415^2 .

It is a cyclic number.

It is not a de Polignac number, because 8478149 - 2⁴ = 8478133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8478109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4239074 + 4239075.

It is an arithmetic number, because the mean of its divisors is an integer number (4239075).

Almost surely, 2^8478149 is an apocalyptic number.

It is an amenable number.

8478149 is a deficient number, since it is larger than the sum of its proper divisors (1).

8478149 is an equidigital number, since it uses as much as digits as its factorization.

8478149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 41.

The square root of 8478149 is about 2911.7261203623. The cubic root of 8478149 is about 203.9077261144.

The spelling of 8478149 in words is "eight million, four hundred seventy-eight thousand, one hundred forty-nine".