442643207 has 2 divisors, whose sum is σ = 442643208. Its totient is φ = 442643206.

The previous prime is 442643183. The next prime is 442643219. The reversal of 442643207 is 702346244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442643207 - 2²⁴ = 425865991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442643407) 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, 221321603 + 221321604.

It is an arithmetic number, because the mean of its divisors is an integer number (221321604).

Almost surely, 2^442643207 is an apocalyptic number.

442643207 is a deficient number, since it is larger than the sum of its proper divisors (1).

442643207 is an equidigital number, since it uses as much as digits as its factorization.

442643207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 32.

The square root of 442643207 is about 21039.0875990381. The cubic root of 442643207 is about 762.1104814054.

The spelling of 442643207 in words is "four hundred forty-two million, six hundred forty-three thousand, two hundred seven".