447409 has 2 divisors, whose sum is σ = 447410. Its totient is φ = 447408.

The previous prime is 447401. The next prime is 447427. The reversal of 447409 is 904744.

447409 is nontrivially palindromic in base 14.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 442225 + 5184 = 665^2 + 72^2 .

It is a cyclic number.

It is not a de Polignac number, because 447409 - 2³ = 447401 is a prime.

447409 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (447401) 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 as a sum of consecutive naturals, namely, 223704 + 223705.

It is an arithmetic number, because the mean of its divisors is an integer number (223705).

2⁴⁴⁷⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

447409 is a deficient number, since it is larger than the sum of its proper divisors (1).

447409 is an equidigital number, since it uses as much as digits as its factorization.

447409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 447409 is about 668.8863879614. The cubic root of 447409 is about 76.4835854112.

The spelling of 447409 in words is "four hundred forty-seven thousand, four hundred nine".