42943691 has 12 divisors (see below), whose sum is σ = 51309552. Its totient is φ = 35205456.

The previous prime is 42943651. The next prime is 42943697. The reversal of 42943691 is 19634924.

42943691 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 42943691 - 2¹⁴ = 42927307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42943697) 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 11 ways as a sum of consecutive naturals, for example, 2096 + ... + 9501.

It is an arithmetic number, because the mean of its divisors is an integer number (4275796).

Almost surely, 2^42943691 is an apocalyptic number.

42943691 is a deficient number, since it is larger than the sum of its proper divisors (8365861).

42943691 is a wasteful number, since it uses less digits than its factorization.

42943691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11650 (or 11627 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 42943691 is about 6553.1435967786. The cubic root of 42943691 is about 350.1868145546.

It can be divided in two parts, 42943 and 691, that added together give a palindrome (43634).

The spelling of 42943691 in words is "forty-two million, nine hundred forty-three thousand, six hundred ninety-one".