442444549 has 4 divisors (see below), whose sum is σ = 443098764. Its totient is φ = 441790336.

The previous prime is 442444463. The next prime is 442444573. The reversal of 442444549 is 945444244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 213890625 + 228553924 = 14625^2 + 15118^2 .

It is a cyclic number.

It is not a de Polignac number, because 442444549 - 2⁷ = 442444421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442444589) 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, 326092 + ... + 327445.

It is an arithmetic number, because the mean of its divisors is an integer number (110774691).

Almost surely, 2^442444549 is an apocalyptic number.

It is an amenable number.

442444549 is a deficient number, since it is larger than the sum of its proper divisors (654215).

442444549 is an equidigital number, since it uses as much as digits as its factorization.

442444549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654214.

The product of its digits is 368640, while the sum is 40.

The square root of 442444549 is about 21034.3659043956. The cubic root of 442444549 is about 761.9964527727.

The spelling of 442444549 in words is "four hundred forty-two million, four hundred forty-four thousand, five hundred forty-nine".