447309 has 8 divisors (see below), whose sum is σ = 662720. Its totient is φ = 298188.

The previous prime is 447263. The next prime is 447311. The reversal of 447309 is 903744.

It is not a de Polignac number, because 447309 - 2⁸ = 447053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 16567 = 447309 / (4 + 4 + 7 + 3 + 0 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447319) 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 7 ways as a sum of consecutive naturals, for example, 8257 + ... + 8310.

It is an arithmetic number, because the mean of its divisors is an integer number (82840).

2⁴⁴⁷³⁰⁹ is an apocalyptic number.

It is an amenable number.

447309 is a deficient number, since it is larger than the sum of its proper divisors (215411).

447309 is a wasteful number, since it uses less digits than its factorization.

447309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16576 (or 16570 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 447309 is about 668.8116326740. The cubic root of 447309 is about 76.4778867265.

The spelling of 447309 in words is "four hundred forty-seven thousand, three hundred nine".