42943819 has 8 divisors (see below), whose sum is σ = 47863440. Its totient is φ = 38290176.

The previous prime is 42943811. The next prime is 42943871. The reversal of 42943819 is 91834924.

42943819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42943819 - 2³ = 42943811 is a prime.

It is a super-2 number, since 2×42943819² = 3688343180609522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42943811) 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 7 ways as a sum of consecutive naturals, for example, 66154 + ... + 66799.

It is an arithmetic number, because the mean of its divisors is an integer number (5982930).

Almost surely, 2^42943819 is an apocalyptic number.

42943819 is a deficient number, since it is larger than the sum of its proper divisors (4919621).

42943819 is a wasteful number, since it uses less digits than its factorization.

42943819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132989.

The product of its digits is 62208, while the sum is 40.

The square root of 42943819 is about 6553.1533630764. The cubic root of 42943819 is about 350.1871624821.

The spelling of 42943819 in words is "forty-two million, nine hundred forty-three thousand, eight hundred nineteen".