442920193 has 4 divisors (see below), whose sum is σ = 468974340. Its totient is φ = 416866048.

The previous prime is 442920143. The next prime is 442920209. The reversal of 442920193 is 391029244.

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 317659329 + 125260864 = 17823^2 + 11192^2 .

It is a cyclic number.

It is not a de Polignac number, because 442920193 - 2²¹ = 440823041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442920113) 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, 13027048 + ... + 13027081.

It is an arithmetic number, because the mean of its divisors is an integer number (117243585).

Almost surely, 2^442920193 is an apocalyptic number.

It is an amenable number.

442920193 is a deficient number, since it is larger than the sum of its proper divisors (26054147).

442920193 is a wasteful number, since it uses less digits than its factorization.

442920193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26054146.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 442920193 is about 21045.6692219563. The cubic root of 442920193 is about 762.2694129592.

The spelling of 442920193 in words is "four hundred forty-two million, nine hundred twenty thousand, one hundred ninety-three".