442505663 has 2 divisors, whose sum is σ = 442505664. Its totient is φ = 442505662.

The previous prime is 442505641. The next prime is 442505711. The reversal of 442505663 is 366505244.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442505663 - 2²⁴ = 425728447 is a prime.

It is a super-2 number, since 2×442505663² = 391622523574139138, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442505263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221252831 + 221252832.

It is an arithmetic number, because the mean of its divisors is an integer number (221252832).

Almost surely, 2^442505663 is an apocalyptic number.

442505663 is a deficient number, since it is larger than the sum of its proper divisors (1).

442505663 is an equidigital number, since it uses as much as digits as its factorization.

442505663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 442505663 is about 21035.8185721402. The cubic root of 442505663 is about 762.0315355172.

The spelling of 442505663 in words is "four hundred forty-two million, five hundred five thousand, six hundred sixty-three".