42093791 has 4 divisors (see below), whose sum is σ = 42177000. Its totient is φ = 42010584.

The previous prime is 42093781. The next prime is 42093809. The reversal of 42093791 is 19739024.

42093791 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 42093791 - 2²² = 37899487 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 (42093781) 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, 40841 + ... + 41858.

It is an arithmetic number, because the mean of its divisors is an integer number (10544250).

Almost surely, 2^42093791 is an apocalyptic number.

42093791 is a deficient number, since it is larger than the sum of its proper divisors (83209).

42093791 is an equidigital number, since it uses as much as digits as its factorization.

42093791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83208.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 42093791 is about 6487.9727958739. The cubic root of 42093791 is about 347.8612181674.

It can be divided in two parts, 4209 and 3791, that added together give a cube (8000 = 20³).

The spelling of 42093791 in words is "forty-two million, ninety-three thousand, seven hundred ninety-one".