447897663 has 24 divisors (see below), whose sum is σ = 675810720. Its totient is φ = 285485760.

The previous prime is 447897661. The next prime is 447897683. The reversal of 447897663 is 366798744.

It is a happy number.

It is not a de Polignac number, because 447897663 - 2¹ = 447897661 is a prime.

It is a super-2 number, since 2×447897663² = 401224633041723138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447897661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18553 + ... + 35213.

It is an arithmetic number, because the mean of its divisors is an integer number (28158780).

Almost surely, 2^447897663 is an apocalyptic number.

447897663 is a deficient number, since it is larger than the sum of its proper divisors (227913057).

447897663 is a wasteful number, since it uses less digits than its factorization.

447897663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16799 (or 16796 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The square root of 447897663 is about 21163.5928660518. The cubic root of 447897663 is about 765.1142056844.

The spelling of 447897663 in words is "four hundred forty-seven million, eight hundred ninety-seven thousand, six hundred sixty-three".