450209 has 2 divisors, whose sum is σ = 450210. Its totient is φ = 450208.

The previous prime is 450199. The next prime is 450217. The reversal of 450209 is 902054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305809 + 144400 = 553^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 450209 - 2⁴ = 450193 is a prime.

It is not a weakly prime, because it can be changed into another prime (450239) 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, 225104 + 225105.

It is an arithmetic number, because the mean of its divisors is an integer number (225105).

2⁴⁵⁰²⁰⁹ is an apocalyptic number.

It is an amenable number.

450209 is a deficient number, since it is larger than the sum of its proper divisors (1).

450209 is an equidigital number, since it uses as much as digits as its factorization.

450209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 450209 is about 670.9761545688. The cubic root of 450209 is about 76.6428050085.

The spelling of 450209 in words is "four hundred fifty thousand, two hundred nine".