450547209 has 72 divisors (see below), whose sum is σ = 844028640. Its totient is φ = 229485312.

The previous prime is 450547199. The next prime is 450547267. The reversal of 450547209 is 902745054.

It is not a de Polignac number, because 450547209 - 2⁷ = 450547081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (450547289) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 140862 + ... + 144024.

It is an arithmetic number, because the mean of its divisors is an integer number (11722620).

Almost surely, 2^450547209 is an apocalyptic number.

450547209 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

450547209 is a deficient number, since it is larger than the sum of its proper divisors (393481431).

450547209 is a wasteful number, since it uses less digits than its factorization.

450547209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219 (or 3209 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 450547209 is about 21226.0973567917. The cubic root of 450547209 is about 766.6199224388.

The spelling of 450547209 in words is "four hundred fifty million, five hundred forty-seven thousand, two hundred nine".