447813861 has 12 divisors (see below), whose sum is σ = 656300736. Its totient is φ = 271402120.

The previous prime is 447813857. The next prime is 447813973. The reversal of 447813861 is 168318744.

It is not a de Polignac number, because 447813861 - 2² = 447813857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447813161) 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, 616461 + ... + 617186.

It is an arithmetic number, because the mean of its divisors is an integer number (54691728).

Almost surely, 2^447813861 is an apocalyptic number.

It is an amenable number.

447813861 is a deficient number, since it is larger than the sum of its proper divisors (208486875).

447813861 is a wasteful number, since it uses less digits than its factorization.

447813861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233672 (or 1233661 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 447813861 is about 21161.6129111181. The cubic root of 447813861 is about 765.0664848877.

The spelling of 447813861 in words is "four hundred forty-seven million, eight hundred thirteen thousand, eight hundred sixty-one".