42903891 has 16 divisors (see below), whose sum is σ = 64194720. Its totient is φ = 28317600.

The previous prime is 42903877. The next prime is 42903893. The reversal of 42903891 is 19830924.

42903891 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 42903891 - 2¹¹ = 42901843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42903893) 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 15 ways as a sum of consecutive naturals, for example, 5140 + ... + 10593.

It is an arithmetic number, because the mean of its divisors is an integer number (4012170).

Almost surely, 2^42903891 is an apocalyptic number.

42903891 is a deficient number, since it is larger than the sum of its proper divisors (21290829).

42903891 is a wasteful number, since it uses less digits than its factorization.

42903891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15843 (or 15837 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 42903891 is about 6550.1061823454. The cubic root of 42903891 is about 350.0785973146.

The spelling of 42903891 in words is "forty-two million, nine hundred three thousand, eight hundred ninety-one".