642744383 has 4 divisors (see below), whose sum is σ = 649966320. Its totient is φ = 635522448.

The previous prime is 642744379. The next prime is 642744391. The reversal of 642744383 is 383447246.

It is a happy number.

642744383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 642744383 - 2² = 642744379 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 642744383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642744083) 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, 3610835 + ... + 3611012.

It is an arithmetic number, because the mean of its divisors is an integer number (162491580).

Almost surely, 2^642744383 is an apocalyptic number.

642744383 is a deficient number, since it is larger than the sum of its proper divisors (7221937).

642744383 is an equidigital number, since it uses as much as digits as its factorization.

642744383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7221936.

The product of its digits is 387072, while the sum is 41.

The square root of 642744383 is about 25352.4038899667. The cubic root of 642744383 is about 863.0039099195.

The spelling of 642744383 in words is "six hundred forty-two million, seven hundred forty-four thousand, three hundred eighty-three".