455444809 has 2 divisors, whose sum is σ = 455444810. Its totient is φ = 455444808.

The previous prime is 455444753. The next prime is 455444831. The reversal of 455444809 is 908444554.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250525584 + 204919225 = 15828^2 + 14315^2 .

It is a cyclic number.

It is not a de Polignac number, because 455444809 - 2²³ = 447056201 is a prime.

It is not a weakly prime, because it can be changed into another prime (455444009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227722404 + 227722405.

It is an arithmetic number, because the mean of its divisors is an integer number (227722405).

Almost surely, 2^455444809 is an apocalyptic number.

It is an amenable number.

455444809 is a deficient number, since it is larger than the sum of its proper divisors (1).

455444809 is an equidigital number, since it uses as much as digits as its factorization.

455444809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460800, while the sum is 43.

The square root of 455444809 is about 21341.1529444873. The cubic root of 455444809 is about 769.3877231968.

The spelling of 455444809 in words is "four hundred fifty-five million, four hundred forty-four thousand, eight hundred nine".