447891 has 4 divisors (see below), whose sum is σ = 597192. Its totient is φ = 298592.

The previous prime is 447883. The next prime is 447893. The reversal of 447891 is 198744.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 447891 - 2³ = 447883 is a prime.

It is a super-3 number, since 3×447891³ = 269549333276306913, which contains 333 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (447893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74646 + ... + 74651.

It is an arithmetic number, because the mean of its divisors is an integer number (149298).

2⁴⁴⁷⁸⁹¹ is an apocalyptic number.

447891 is a deficient number, since it is larger than the sum of its proper divisors (149301).

447891 is a wasteful number, since it uses less digits than its factorization.

447891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149300.

The product of its digits is 8064, while the sum is 33.

The square root of 447891 is about 669.2465913249. The cubic root of 447891 is about 76.5110411677.

It can be divided in two parts, 4 and 47891, that added together give a triangular number (47895 = T₃₀₉).

The spelling of 447891 in words is "four hundred forty-seven thousand, eight hundred ninety-one".