442626643 has 2 divisors, whose sum is σ = 442626644. Its totient is φ = 442626642.

The previous prime is 442626601. The next prime is 442626661. The reversal of 442626643 is 346626244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442626643 - 2⁹ = 442626131 is a prime.

It is not a weakly prime, because it can be changed into another prime (442626343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221313321 + 221313322.

It is an arithmetic number, because the mean of its divisors is an integer number (221313322).

Almost surely, 2^442626643 is an apocalyptic number.

442626643 is a deficient number, since it is larger than the sum of its proper divisors (1).

442626643 is an equidigital number, since it uses as much as digits as its factorization.

442626643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 37.

The square root of 442626643 is about 21038.6939471061. The cubic root of 442626643 is about 762.1009750616.

It can be divided in two parts, 44262 and 6643, that added together give a palindrome (50905).

The spelling of 442626643 in words is "four hundred forty-two million, six hundred twenty-six thousand, six hundred forty-three".