442554809 has 2 divisors, whose sum is σ = 442554810. Its totient is φ = 442554808.

The previous prime is 442554751. The next prime is 442554851. The reversal of 442554809 is 908455244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424236409 + 18318400 = 20597^2 + 4280^2 .

It is a cyclic number.

It is not a de Polignac number, because 442554809 - 2²⁸ = 174119353 is a prime.

It is not a weakly prime, because it can be changed into another prime (442554869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221277404 + 221277405.

It is an arithmetic number, because the mean of its divisors is an integer number (221277405).

Almost surely, 2^442554809 is an apocalyptic number.

It is an amenable number.

442554809 is a deficient number, since it is larger than the sum of its proper divisors (1).

442554809 is an equidigital number, since it uses as much as digits as its factorization.

442554809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 442554809 is about 21036.9866901132. The cubic root of 442554809 is about 762.0597456386.

The spelling of 442554809 in words is "four hundred forty-two million, five hundred fifty-four thousand, eight hundred nine".