442459813 has 4 divisors (see below), whose sum is σ = 442590048. Its totient is φ = 442329580.

The previous prime is 442459711. The next prime is 442459817. The reversal of 442459813 is 318954244.

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 442459813 - 2⁹ = 442459301 is a prime.

It is a super-2 number, since 2×442459813² = 391541372239989938, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442459817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59881 + ... + 66862.

It is an arithmetic number, because the mean of its divisors is an integer number (110647512).

Almost surely, 2^442459813 is an apocalyptic number.

It is an amenable number.

442459813 is a deficient number, since it is larger than the sum of its proper divisors (130235).

442459813 is a wasteful number, since it uses less digits than its factorization.

442459813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130234.

The product of its digits is 138240, while the sum is 40.

The square root of 442459813 is about 21034.7287360688. The cubic root of 442459813 is about 762.0052154377.

The spelling of 442459813 in words is "four hundred forty-two million, four hundred fifty-nine thousand, eight hundred thirteen".