442891601 has 4 divisors (see below), whose sum is σ = 443409252. Its totient is φ = 442373952.

The previous prime is 442891597. The next prime is 442891609. The reversal of 442891601 is 106198244.

It is a happy number.

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 423742225 + 19149376 = 20585^2 + 4376^2 .

It is a cyclic number.

It is not a de Polignac number, because 442891601 - 2² = 442891597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (442891609) 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, 257540 + ... + 259253.

It is an arithmetic number, because the mean of its divisors is an integer number (110852313).

Almost surely, 2^442891601 is an apocalyptic number.

It is an amenable number.

442891601 is a deficient number, since it is larger than the sum of its proper divisors (517651).

442891601 is an equidigital number, since it uses as much as digits as its factorization.

442891601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517650.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 442891601 is about 21044.9899263459. The cubic root of 442891601 is about 762.2530102480.

The spelling of 442891601 in words is "four hundred forty-two million, eight hundred ninety-one thousand, six hundred one".