8427447 has 12 divisors (see below), whose sum is σ = 13912080. Its totient is φ = 4815648.

The previous prime is 8427439. The next prime is 8427449. The reversal of 8427447 is 7447248.

8427447 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8427447 - 2³ = 8427439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8427449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66822 + ... + 66947.

It is an arithmetic number, because the mean of its divisors is an integer number (1159340).

Almost surely, 2^8427447 is an apocalyptic number.

8427447 is a deficient number, since it is larger than the sum of its proper divisors (5484633).

8427447 is a wasteful number, since it uses less digits than its factorization.

8427447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133782 (or 133779 counting only the distinct ones).

The product of its digits is 50176, while the sum is 36.

The square root of 8427447 is about 2903.0065449461. The cubic root of 8427447 is about 203.5004356592.

The spelling of 8427447 in words is "eight million, four hundred twenty-seven thousand, four hundred forty-seven".