447646399 has 4 divisors (see below), whose sum is σ = 447698680. Its totient is φ = 447594120.

The previous prime is 447646391. The next prime is 447646421. The reversal of 447646399 is 993646744.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 447646399 - 2³ = 447646391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447646391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9957 + ... + 31534.

It is an arithmetic number, because the mean of its divisors is an integer number (111924670).

Almost surely, 2^447646399 is an apocalyptic number.

447646399 is a deficient number, since it is larger than the sum of its proper divisors (52281).

447646399 is a wasteful number, since it uses less digits than its factorization.

447646399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52280.

The product of its digits is 3919104, while the sum is 52.

The square root of 447646399 is about 21157.6558011515. The cubic root of 447646399 is about 764.9711063175.

The spelling of 447646399 in words is "four hundred forty-seven million, six hundred forty-six thousand, three hundred ninety-nine".