42643799 has 4 divisors (see below), whose sum is σ = 46520520. Its totient is φ = 38767080.

The previous prime is 42643793. The next prime is 42643801. The reversal of 42643799 is 99734624.

42643799 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 de Polignac number, because none of the positive numbers 2^k-42643799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42643793) 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, 1938344 + ... + 1938365.

It is an arithmetic number, because the mean of its divisors is an integer number (11630130).

Almost surely, 2^42643799 is an apocalyptic number.

42643799 is a deficient number, since it is larger than the sum of its proper divisors (3876721).

42643799 is a wasteful number, since it uses less digits than its factorization.

42643799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876720.

The product of its digits is 326592, while the sum is 44.

The square root of 42643799 is about 6530.2219717250. The cubic root of 42643799 is about 349.3697474043.

The spelling of 42643799 in words is "forty-two million, six hundred forty-three thousand, seven hundred ninety-nine".