442564049 has 2 divisors, whose sum is σ = 442564050. Its totient is φ = 442564048.

The previous prime is 442564037. The next prime is 442564063. The reversal of 442564049 is 940465244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439657024 + 2907025 = 20968^2 + 1705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442564049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (442564019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221282024 + 221282025.

It is an arithmetic number, because the mean of its divisors is an integer number (221282025).

Almost surely, 2^442564049 is an apocalyptic number.

It is an amenable number.

442564049 is a deficient number, since it is larger than the sum of its proper divisors (1).

442564049 is an equidigital number, since it uses as much as digits as its factorization.

442564049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 442564049 is about 21037.2063021685. The cubic root of 442564049 is about 762.0650492251.

The spelling of 442564049 in words is "four hundred forty-two million, five hundred sixty-four thousand, forty-nine".