447139971 has 12 divisors (see below), whose sum is σ = 646246848. Its totient is φ = 297918864.

The previous prime is 447139969. The next prime is 447139991. The reversal of 447139971 is 179931744.

447139971 is a `hidden beast` number, since 447 + 139 + 9 + 71 = 666.

It is not a de Polignac number, because 447139971 - 2¹ = 447139969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (447139991) 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 11 ways as a sum of consecutive naturals, for example, 2781 + ... + 30033.

It is an arithmetic number, because the mean of its divisors is an integer number (53853904).

Almost surely, 2^447139971 is an apocalyptic number.

447139971 is a deficient number, since it is larger than the sum of its proper divisors (199106877).

447139971 is a wasteful number, since it uses less digits than its factorization.

447139971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29082 (or 29079 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 447139971 is about 21145.6844533347. The cubic root of 447139971 is about 764.6825236539.

The spelling of 447139971 in words is "four hundred forty-seven million, one hundred thirty-nine thousand, nine hundred seventy-one".