442331609 has 4 divisors (see below), whose sum is σ = 465612240. Its totient is φ = 419050980.

The previous prime is 442331581. The next prime is 442331611. The reversal of 442331609 is 906133244.

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 442331609 - 2⁸ = 442331353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442331639) 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, 11640287 + ... + 11640324.

It is an arithmetic number, because the mean of its divisors is an integer number (116403060).

Almost surely, 2^442331609 is an apocalyptic number.

It is an amenable number.

442331609 is a deficient number, since it is larger than the sum of its proper divisors (23280631).

442331609 is a wasteful number, since it uses less digits than its factorization.

442331609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23280630.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 442331609 is about 21031.6810787916. The cubic root of 442331609 is about 761.9316105958.

The spelling of 442331609 in words is "four hundred forty-two million, three hundred thirty-one thousand, six hundred nine".