442991743 has 4 divisors (see below), whose sum is σ = 443266648. Its totient is φ = 442716840.

The previous prime is 442991737. The next prime is 442991819. The reversal of 442991743 is 347199244.

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 442991743 - 2²¹ = 440894591 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442991743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442991243) 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, 135021 + ... + 138262.

It is an arithmetic number, because the mean of its divisors is an integer number (110816662).

Almost surely, 2^442991743 is an apocalyptic number.

442991743 is a deficient number, since it is larger than the sum of its proper divisors (274905).

442991743 is a wasteful number, since it uses less digits than its factorization.

442991743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274904.

The product of its digits is 217728, while the sum is 43.

The square root of 442991743 is about 21047.3690279807. The cubic root of 442991743 is about 762.3104568017.

The spelling of 442991743 in words is "four hundred forty-two million, nine hundred ninety-one thousand, seven hundred forty-three".