450354809 has 2 divisors, whose sum is σ = 450354810. Its totient is φ = 450354808.

The previous prime is 450354797. The next prime is 450354823. The reversal of 450354809 is 908453054.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439824784 + 10530025 = 20972^2 + 3245^2 .

It is a cyclic number.

It is not a de Polignac number, because 450354809 - 2²⁰ = 449306233 is a prime.

It is not a weakly prime, because it can be changed into another prime (450354869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225177404 + 225177405.

It is an arithmetic number, because the mean of its divisors is an integer number (225177405).

Almost surely, 2^450354809 is an apocalyptic number.

It is an amenable number.

450354809 is a deficient number, since it is larger than the sum of its proper divisors (1).

450354809 is an equidigital number, since it uses as much as digits as its factorization.

450354809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 450354809 is about 21221.5647161089. The cubic root of 450354809 is about 766.5107820641.

The spelling of 450354809 in words is "four hundred fifty million, three hundred fifty-four thousand, eight hundred nine".