442643299 has 4 divisors (see below), whose sum is σ = 505878064. Its totient is φ = 379408536.

The previous prime is 442643293. The next prime is 442643347. The reversal of 442643299 is 992346244.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 442643299 - 2²¹ = 440546147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442643293) 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, 31617372 + ... + 31617385.

It is an arithmetic number, because the mean of its divisors is an integer number (126469516).

Almost surely, 2^442643299 is an apocalyptic number.

442643299 is a deficient number, since it is larger than the sum of its proper divisors (63234765).

442643299 is an equidigital number, since it uses as much as digits as its factorization.

442643299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63234764.

The product of its digits is 373248, while the sum is 43.

The square root of 442643299 is about 21039.0897854446. The cubic root of 442643299 is about 762.1105342050.

The spelling of 442643299 in words is "four hundred forty-two million, six hundred forty-three thousand, two hundred ninety-nine".