442668769 has 4 divisors (see below), whose sum is σ = 443515696. Its totient is φ = 441821844.

The previous prime is 442668749. The next prime is 442668791. The reversal of 442668769 is 967866244.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 442668769 - 2¹⁵ = 442636001 is a prime.

It is a super-2 number, since 2×442668769² = 391911278095950722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442668749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422679 + ... + 423724.

It is an arithmetic number, because the mean of its divisors is an integer number (110878924).

Almost surely, 2^442668769 is an apocalyptic number.

It is an amenable number.

442668769 is a deficient number, since it is larger than the sum of its proper divisors (846927).

442668769 is an equidigital number, since it uses as much as digits as its factorization.

442668769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846926.

The product of its digits is 3483648, while the sum is 52.

The square root of 442668769 is about 21039.6950785889. The cubic root of 442668769 is about 762.1251513795.

It can be divided in two parts, 44266 and 8769, that added together give a palindrome (53035).

The spelling of 442668769 in words is "four hundred forty-two million, six hundred sixty-eight thousand, seven hundred sixty-nine".