42379843 has 4 divisors (see below), whose sum is σ = 46232568. Its totient is φ = 38527120.

The previous prime is 42379781. The next prime is 42379847. The reversal of 42379843 is 34897324.

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 42379843 - 2¹⁷ = 42248771 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42379796 and 42379805.

It is not an unprimeable number, because it can be changed into a prime (42379847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1926346 + ... + 1926367.

It is an arithmetic number, because the mean of its divisors is an integer number (11558142).

Almost surely, 2^42379843 is an apocalyptic number.

42379843 is a deficient number, since it is larger than the sum of its proper divisors (3852725).

42379843 is a wasteful number, since it uses less digits than its factorization.

42379843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3852724.

The product of its digits is 145152, while the sum is 40.

The square root of 42379843 is about 6509.9802611068. The cubic root of 42379843 is about 348.6474136331.

The spelling of 42379843 in words is "forty-two million, three hundred seventy-nine thousand, eight hundred forty-three".