442220817869 has 2 divisors, whose sum is σ = 442220817870. Its totient is φ = 442220817868.

The previous prime is 442220817781. The next prime is 442220817893. The reversal of 442220817869 is 968718022244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406476378025 + 35744439844 = 637555^2 + 189062^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442220817869 is a prime.

It is a super-2 number, since 2×442220817869² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 442220817869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442220817569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221110408934 + 221110408935.

It is an arithmetic number, because the mean of its divisors is an integer number (221110408935).

Almost surely, 2^442220817869 is an apocalyptic number.

It is an amenable number.

442220817869 is a deficient number, since it is larger than the sum of its proper divisors (1).

442220817869 is an equidigital number, since it uses as much as digits as its factorization.

442220817869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3096576, while the sum is 53.

The spelling of 442220817869 in words is "four hundred forty-two billion, two hundred twenty million, eight hundred seventeen thousand, eight hundred sixty-nine".