442246643 has 2 divisors, whose sum is σ = 442246644. Its totient is φ = 442246642.

The previous prime is 442246583. The next prime is 442246657. The reversal of 442246643 is 346642244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442246643 - 2¹⁰ = 442245619 is a prime.

It is not a weakly prime, because it can be changed into another prime (442246663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221123321 + 221123322.

It is an arithmetic number, because the mean of its divisors is an integer number (221123322).

Almost surely, 2^442246643 is an apocalyptic number.

442246643 is a deficient number, since it is larger than the sum of its proper divisors (1).

442246643 is an equidigital number, since it uses as much as digits as its factorization.

442246643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 35.

The square root of 442246643 is about 21029.6610291274. The cubic root of 442246643 is about 761.8828218399.

Adding to 442246643 its reverse (346642244), we get a palindrome (788888887).

The spelling of 442246643 in words is "four hundred forty-two million, two hundred forty-six thousand, six hundred forty-three".