442556749 has 4 divisors (see below), whose sum is σ = 442664640. Its totient is φ = 442448860.

The previous prime is 442556729. The next prime is 442556761. The reversal of 442556749 is 947655244.

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 442556749 - 2¹⁵ = 442523981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442556699 and 442556708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442556729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47539 + ... + 56080.

It is an arithmetic number, because the mean of its divisors is an integer number (110666160).

Almost surely, 2^442556749 is an apocalyptic number.

It is an amenable number.

442556749 is a deficient number, since it is larger than the sum of its proper divisors (107891).

442556749 is a wasteful number, since it uses less digits than its factorization.

442556749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107890.

The product of its digits is 1209600, while the sum is 46.

The square root of 442556749 is about 21037.0327993280. The cubic root of 442556749 is about 762.0608591683.

The spelling of 442556749 in words is "four hundred forty-two million, five hundred fifty-six thousand, seven hundred forty-nine".