42939539 has 4 divisors (see below), whose sum is σ = 43042440. Its totient is φ = 42836640.

The previous prime is 42939521. The next prime is 42939553. The reversal of 42939539 is 93593924.

42939539 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 42939539 - 2¹⁶ = 42874003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42939539.

It is not an unprimeable number, because it can be changed into a prime (42939509) 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, 50822 + ... + 51659.

It is an arithmetic number, because the mean of its divisors is an integer number (10760610).

Almost surely, 2^42939539 is an apocalyptic number.

42939539 is a deficient number, since it is larger than the sum of its proper divisors (102901).

42939539 is a wasteful number, since it uses less digits than its factorization.

42939539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102900.

The product of its digits is 262440, while the sum is 44.

The square root of 42939539 is about 6552.8267945979. The cubic root of 42939539 is about 350.1755282827.

The spelling of 42939539 in words is "forty-two million, nine hundred thirty-nine thousand, five hundred thirty-nine".