442404143 has 2 divisors, whose sum is σ = 442404144. Its totient is φ = 442404142.

The previous prime is 442404121. The next prime is 442404173. The reversal of 442404143 is 341404244.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442404143 - 2⁸ = 442403887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442404173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221202071 + 221202072.

It is an arithmetic number, because the mean of its divisors is an integer number (221202072).

Almost surely, 2^442404143 is an apocalyptic number.

442404143 is a deficient number, since it is larger than the sum of its proper divisors (1).

442404143 is an equidigital number, since it uses as much as digits as its factorization.

442404143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 442404143 is about 21033.4054066383. The cubic root of 442404143 is about 761.9732557671.

Adding to 442404143 its reverse (341404244), we get a palindrome (783808387).

The spelling of 442404143 in words is "four hundred forty-two million, four hundred four thousand, one hundred forty-three".