442443404413 has 4 divisors (see below), whose sum is σ = 454401334300. Its totient is φ = 430485474528.

The previous prime is 442443404383. The next prime is 442443404453. The reversal of 442443404413 is 314404344244.

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 347201420644 + 95241983769 = 589238^2 + 308613^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442443404413 is a prime.

It is a super-2 number, since 2×442443404413² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 11957929849 = 442443404413 / (4 + 4 + 2 + 4 + 4 + 3 + 4 + 0 + 4 + 4 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442443404453) 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, 5978964888 + ... + 5978964961.

It is an arithmetic number, because the mean of its divisors is an integer number (113600333575).

Almost surely, 2^442443404413 is an apocalyptic number.

It is an amenable number.

442443404413 is a deficient number, since it is larger than the sum of its proper divisors (11957929887).

442443404413 is a wasteful number, since it uses less digits than its factorization.

442443404413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11957929886.

The product of its (nonzero) digits is 294912, while the sum is 37.

Adding to 442443404413 its reverse (314404344244), we get a palindrome (756847748657).

The spelling of 442443404413 in words is "four hundred forty-two billion, four hundred forty-three million, four hundred four thousand, four hundred thirteen".