42347891 has 8 divisors (see below), whose sum is σ = 44208000. Its totient is φ = 40518720.

The previous prime is 42347873. The next prime is 42347897. The reversal of 42347891 is 19874324.

42347891 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 42347891 - 2¹⁰ = 42346867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42347897) 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, 4916 + ... + 10433.

It is an arithmetic number, because the mean of its divisors is an integer number (5526000).

Almost surely, 2^42347891 is an apocalyptic number.

42347891 is a deficient number, since it is larger than the sum of its proper divisors (1860109).

42347891 is a wasteful number, since it uses less digits than its factorization.

42347891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15469.

The product of its digits is 48384, while the sum is 38.

The square root of 42347891 is about 6507.5257202719. The cubic root of 42347891 is about 348.5597714729.

The spelling of 42347891 in words is "forty-two million, three hundred forty-seven thousand, eight hundred ninety-one".