42686791 has 6 divisors (see below), whose sum is σ = 49656120. Its totient is φ = 36588636.

The previous prime is 42686759. The next prime is 42686801. The reversal of 42686791 is 19768624.

42686791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42686791 - 2⁵ = 42686759 is a prime.

It is a super-3 number, since 3×42686791³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42686701) 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 5 ways as a sum of consecutive naturals, for example, 435531 + ... + 435628.

It is an arithmetic number, because the mean of its divisors is an integer number (8276020).

Almost surely, 2^42686791 is an apocalyptic number.

42686791 is a deficient number, since it is larger than the sum of its proper divisors (6969329).

42686791 is an equidigital number, since it uses as much as digits as its factorization.

42686791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871173 (or 871166 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 42686791 is about 6533.5129141986. The cubic root of 42686791 is about 349.4871154608.

The spelling of 42686791 in words is "forty-two million, six hundred eighty-six thousand, seven hundred ninety-one".